{
    "id": 11234,
    "url": "https://svs.gsfc.nasa.gov/11234/",
    "page_type": "Produced Video",
    "title": "Mapping Earth's Gravity",
    "description": "Of the terrestrial planets in the solar system, Earth is not only the largest body but also the most massive. A calculation of its weight puts it slightly over 6.58 sextillion tons (that's 6.58x10^21 or 6,580,000,000,000,000,000,000). It's heavy because everything on our planet has mass—from the land that covers the continents to the water that fills the oceans. Earth's mass, however, isn't distributed evenly. Varying surface topography and the continuous movement of water cause different parts of the globe to have more or less mass than other regions. Since 2002, NASA's twin GRACE satellites have mapped Earth's gravity (the attractive force exerted by its mass), enabling scientists to see these differences and monitor how they change over time. Watch the visualization for a tour of Earth's gravity field. || ",
    "release_date": "2013-04-23T00:00:00-04:00",
    "update_date": "2023-05-03T13:52:12.980471-04:00",
    "main_image": {
        "id": 466231,
        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/cover-1024g.jpg",
        "filename": "cover-1024g.jpg",
        "media_type": "Image",
        "alt_text": "Satellite measurements offer scientists a new view of our planet.",
        "width": 1024,
        "height": 576,
        "pixels": 589824
    },
    "main_video": {
        "id": 466234,
        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/3655-540-MASTER_high.mp4",
        "filename": "3655-540-MASTER_high.mp4",
        "media_type": "Movie",
        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
        "width": 960,
        "height": 540,
        "pixels": 518400
    },
    "main_credits": {
        "Scientific consulting by": [
            {
                "name": "John C. Ries",
                "employer": "University of Texas"
            },
            {
                "name": "Scott Luthcke",
                "employer": "NASA/GSFC"
            }
        ],
        "Written by": [
            {
                "name": "Kayvon Sharghi",
                "employer": "USRA"
            }
        ]
    },
    "progress": "Complete",
    "media_groups": [
        {
            "id": 346097,
            "url": "https://svs.gsfc.nasa.gov/11234/#media_group_346097",
            "widget": "Basic text with HTML",
            "title": "",
            "caption": "",
            "description": "Of the terrestrial planets in the solar system, Earth is not only the largest body but also the most massive. A calculation of its weight puts it slightly over 6.58 sextillion tons (that's 6.58x10^21 or 6,580,000,000,000,000,000,000). It's heavy because everything on our planet has mass—from the land that covers the continents to the water that fills the oceans. Earth's mass, however, isn't distributed evenly. Varying surface topography and the continuous movement of water cause different parts of the globe to have more or less mass than other regions. Since 2002, NASA's twin GRACE satellites have mapped Earth's gravity (the attractive force exerted by its mass), enabling scientists to see these differences and monitor how they change over time. Watch the visualization for a tour of Earth's gravity field.",
            "items": [],
            "extra_data": {}
        },
        {
            "id": 346098,
            "url": "https://svs.gsfc.nasa.gov/11234/#media_group_346098",
            "widget": "Single image",
            "title": "",
            "caption": "",
            "description": "Satellite measurements offer scientists a new view of our planet.",
            "items": [
                {
                    "id": 309802,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466230,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/cover-1920.jpg",
                        "filename": "cover-1920.jpg",
                        "media_type": "Image",
                        "alt_text": "Satellite measurements offer scientists a new view of our planet.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                },
                {
                    "id": 309803,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466231,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/cover-1024g.jpg",
                        "filename": "cover-1024g.jpg",
                        "media_type": "Image",
                        "alt_text": "Satellite measurements offer scientists a new view of our planet.",
                        "width": 1024,
                        "height": 576,
                        "pixels": 589824
                    }
                },
                {
                    "id": 309805,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466229,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/cover-1024g_web.png",
                        "filename": "cover-1024g_web.png",
                        "media_type": "Image",
                        "alt_text": "Satellite measurements offer scientists a new view of our planet.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                },
                {
                    "id": 309806,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466228,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/cover-1024g_thm.png",
                        "filename": "cover-1024g_thm.png",
                        "media_type": "Image",
                        "alt_text": "Satellite measurements offer scientists a new view of our planet.",
                        "width": 80,
                        "height": 40,
                        "pixels": 3200
                    }
                },
                {
                    "id": 309804,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466232,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/cover-original.tif",
                        "filename": "cover-original.tif",
                        "media_type": "Image",
                        "alt_text": "Satellite measurements offer scientists a new view of our planet.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                }
            ],
            "extra_data": {}
        },
        {
            "id": 346099,
            "url": "https://svs.gsfc.nasa.gov/11234/#media_group_346099",
            "widget": "Video player",
            "title": "",
            "caption": "",
            "description": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
            "items": [
                {
                    "id": 309809,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466235,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/pf-1024g.jpg",
                        "filename": "pf-1024g.jpg",
                        "media_type": "Image",
                        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
                        "width": 1024,
                        "height": 576,
                        "pixels": 589824
                    }
                },
                {
                    "id": 309810,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466236,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/pf-1920g.jpg",
                        "filename": "pf-1920g.jpg",
                        "media_type": "Image",
                        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                },
                {
                    "id": 309808,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466234,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/3655-540-MASTER_high.mp4",
                        "filename": "3655-540-MASTER_high.mp4",
                        "media_type": "Movie",
                        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
                        "width": 960,
                        "height": 540,
                        "pixels": 518400
                    }
                },
                {
                    "id": 309811,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466237,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/pf-original.tif",
                        "filename": "pf-original.tif",
                        "media_type": "Image",
                        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                },
                {
                    "id": 309812,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466238,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/3655-540-MASTER_high.webmhd.webm",
                        "filename": "3655-540-MASTER_high.webmhd.webm",
                        "media_type": "Movie",
                        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity.",
                        "width": 960,
                        "height": 540,
                        "pixels": 518400
                    }
                },
                {
                    "id": 309807,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 853717,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/a011234_iPad_movie_3655-540-MASTER/3655-540-MASTER.m3u8",
                        "filename": "3655-540-MASTER.m3u8",
                        "media_type": "File",
                        "alt_text": "Warm colors (red, orange, yellow) represent areas with strong gravity. Cool colors (green, blue) represent areas with weak gravity."
                    }
                }
            ],
            "extra_data": {}
        },
        {
            "id": 346100,
            "url": "https://svs.gsfc.nasa.gov/11234/#media_group_346100",
            "widget": "Single image",
            "title": "",
            "caption": "",
            "description": "Mountain ranges, such as the Himalayas, have a high concentration of mass, and therefore have a strong gravity field.",
            "items": [
                {
                    "id": 309813,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466240,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/himalayas_labeled_1920x1080.jpg",
                        "filename": "himalayas_labeled_1920x1080.jpg",
                        "media_type": "Image",
                        "alt_text": "Mountain ranges, such as the Himalayas, have a high concentration of mass, and therefore have a strong gravity field.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                },
                {
                    "id": 309814,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466241,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/himalayas_labeled_1024x576.jpg",
                        "filename": "himalayas_labeled_1024x576.jpg",
                        "media_type": "Image",
                        "alt_text": "Mountain ranges, such as the Himalayas, have a high concentration of mass, and therefore have a strong gravity field.",
                        "width": 1024,
                        "height": 576,
                        "pixels": 589824
                    }
                },
                {
                    "id": 309815,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466239,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/himalayas_labeled_1024x576_web.png",
                        "filename": "himalayas_labeled_1024x576_web.png",
                        "media_type": "Image",
                        "alt_text": "Mountain ranges, such as the Himalayas, have a high concentration of mass, and therefore have a strong gravity field.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                }
            ],
            "extra_data": {}
        },
        {
            "id": 346101,
            "url": "https://svs.gsfc.nasa.gov/11234/#media_group_346101",
            "widget": "Single image",
            "title": "",
            "caption": "",
            "description": "Ocean trenches, such as the Mariana Trench, have a low concentration of mass, and therefore have a weak gravity field.",
            "items": [
                {
                    "id": 309816,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466243,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/trench_labeled_1024x576.jpg",
                        "filename": "trench_labeled_1024x576.jpg",
                        "media_type": "Image",
                        "alt_text": "Ocean trenches, such as the Mariana Trench, have a low concentration of mass, and therefore have a weak gravity field.",
                        "width": 1024,
                        "height": 576,
                        "pixels": 589824
                    }
                },
                {
                    "id": 309817,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466244,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/trench_labeled_1920x1080.jpg",
                        "filename": "trench_labeled_1920x1080.jpg",
                        "media_type": "Image",
                        "alt_text": "Ocean trenches, such as the Mariana Trench, have a low concentration of mass, and therefore have a weak gravity field.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                },
                {
                    "id": 309818,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466242,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/trench_labeled_1024x576_web.png",
                        "filename": "trench_labeled_1024x576_web.png",
                        "media_type": "Image",
                        "alt_text": "Ocean trenches, such as the Mariana Trench, have a low concentration of mass, and therefore have a weak gravity field.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                }
            ],
            "extra_data": {}
        },
        {
            "id": 346102,
            "url": "https://svs.gsfc.nasa.gov/11234/#media_group_346102",
            "widget": "Single image",
            "title": "",
            "caption": "",
            "description": "Undersea mountains that line this section of the Mid-Atlantic Ridge contribute to the strong gravity field observed in this region.",
            "items": [
                {
                    "id": 309819,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466246,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/ridge_labeled_1920x1080.jpg",
                        "filename": "ridge_labeled_1920x1080.jpg",
                        "media_type": "Image",
                        "alt_text": "Undersea mountains that line this section of the Mid-Atlantic Ridge contribute to the strong gravity field observed in this region.",
                        "width": 1920,
                        "height": 1080,
                        "pixels": 2073600
                    }
                },
                {
                    "id": 309820,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466247,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/ridge_labeled_1024x576.jpg",
                        "filename": "ridge_labeled_1024x576.jpg",
                        "media_type": "Image",
                        "alt_text": "Undersea mountains that line this section of the Mid-Atlantic Ridge contribute to the strong gravity field observed in this region.",
                        "width": 1024,
                        "height": 576,
                        "pixels": 589824
                    }
                },
                {
                    "id": 309821,
                    "type": "media",
                    "extra_data": null,
                    "title": null,
                    "caption": null,
                    "instance": {
                        "id": 466245,
                        "url": "https://svs.gsfc.nasa.gov/vis/a010000/a011200/a011234/ridge_labeled_1024x576_web.png",
                        "filename": "ridge_labeled_1024x576_web.png",
                        "media_type": "Image",
                        "alt_text": "Undersea mountains that line this section of the Mid-Atlantic Ridge contribute to the strong gravity field observed in this region.",
                        "width": 320,
                        "height": 180,
                        "pixels": 57600
                    }
                }
            ],
            "extra_data": {}
        }
    ],
    "studio": "gms",
    "funding_sources": [
        "PAO"
    ],
    "credits": [
        {
            "role": "Animator",
            "people": [
                {
                    "name": "Adam Martin",
                    "employer": "UMBC"
                }
            ]
        },
        {
            "role": "Producer",
            "people": [
                {
                    "name": "Paul Reddish",
                    "employer": "Free Spirit Films"
                }
            ]
        },
        {
            "role": "Scientist",
            "people": [
                {
                    "name": "John C. Ries",
                    "employer": "University of Texas"
                },
                {
                    "name": "Scott Luthcke",
                    "employer": "NASA/GSFC"
                }
            ]
        },
        {
            "role": "Writer",
            "people": [
                {
                    "name": "Kayvon Sharghi",
                    "employer": "USRA"
                }
            ]
        }
    ],
    "missions": [],
    "series": [],
    "tapes": [],
    "papers": [],
    "datasets": [],
    "nasa_science_categories": [
        "Earth"
    ],
    "keywords": [
        "App"
    ],
    "recommended_pages": [],
    "related": [
        {
            "id": 3655,
            "url": "https://svs.gsfc.nasa.gov/3655/",
            "page_type": "Visualization",
            "title": "GRACE Gravity Model",
            "description": "The following animation displays the Earth's gravitational anomalies. The colors and heights represent the strength of gravity at the locality. Areas with less mass, such as ocean basins, show up as blue, that is less gravity, while mountains such as the Andes are red, representing the greater pull of gravity. The visualization utilizes a version of the GRACE Gravity Model 02 that has been smoothed for greater readability. || ",
            "release_date": "2009-11-24T14:30:00-05:00",
            "update_date": "2024-07-15T00:00:29.231862-04:00",
            "main_image": {
                "id": 495233,
                "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003600/a003655/LargeRender1.0001.jpg",
                "filename": "LargeRender1.0001.jpg",
                "media_type": "Image",
                "alt_text": "Rotating globe with outlines of land masses.",
                "width": 3840,
                "height": 2160,
                "pixels": 8294400
            }
        }
    ],
    "sources": [],
    "products": [],
    "newer_versions": [],
    "older_versions": [],
    "alternate_versions": []
}