IBEX – Interstellar Boundary Explorer

Animation of the interstellar interaction with our Sun-one of billions of stars that orbits around the galaxy. As we zoom in through the galaxy we can see our heliosphere; then if we travel along with the interstellar material, we can see how only a very rare few are directed along precisely the right path to make the 30 year, 15 billion mile journey and enter IBEX's low energy sensor and be detected.For press release media associated with this animation, go: here. ||

This animation shows a charged solar particle's path leaving the sun, while following the magnetic field lines out to the heliosheath. The solar particle hits a hydrogen atom, stealing its electron and becoming neutral. We then follow it until we see it hit one of IBEX's detectors. ||

The Interstellar Boundary EXplorer (IBEX) mission will observe the boundary between the heliosphere and the interstellar medium from a location near the Earth. The mission will measure the flux of hydrogen Energetic Neutral Atoms (ENAs) which can be directed towards the Sun by an interaction with the heliosheath. In this visualization, we see the orbit of the spacecraft orbit (green) in relation to the Earth, the orbit of the Moon (gray), and Sun. For more information, visit the IBEX Mission Project Page at Southwest Research Institute which is managing the mission. We also have additional video outlining the mission (link). ||

This animation show the IBEX spacecraft being launched on a pegasus delivery system till it's on station near the Moon. ||

These animations show IBEX and it's two imagers specialized to detect neutral atoms from the solar system's outer boundaries and galactic medium. ||

The IBEX (Interstellar Boundary EXplorer) continues to collect data on the flux of neutral atoms from the boundary of the solar wind with the interstellar medium.Starting with the IBEX satellite in orbit around the Earth, we zoom out to beyond the orbit of Neptune, illustrating the direction of the Sun relative to the local stars (red arrow) and relative to the local interstellar medium (violet arrow). These directions are different because the local interstellar medium (mostly gas and dust) move relative to the local stars.The boundaries of the termination shock (red ellipsoidal surface) and heliopause (green) created by the interaction of the solar wind with the interstellar medium is displayed. The camera rotates to a view 'nose on' with the heliopause, and a sphere is faded in representing the region where the neutral atoms detected by IBEX originate. The sphere around the Sun is 'unwrapped' to reproject the IBEX data into an approximately Aitoff projection. ||

This page contains resources from the July 10, 2013 media briefing.To watch the media briefing on YouTube, click here.To view the web short on YouTube about this story, click here.NASA’s Interstellar Boundary Explorer, or IBEX, recently mapped the boundaries of the solar system’s tail, called the heliotail. By combining observations from the first three years of IBEX imagery, scientists have mapped out a tail that shows a combination of fast and slow moving particles. The entire structure twisted, because it experiences the pushing and pulling of magnetic fields outside the solar system. ||

The Interstellar Boundary Explorer (IBEX) mission science team has used data from NASA's IBEX spacecraft to construct the first-ever all-sky map of the interactions occurring at the edge of the solar system, where the sun's influence diminishes and interacts with the interstellar medium. The interstellar boundary region shields our solar system from most of the dangerous galactic cosmic radiation that would otherwise enter from interstellar space.This visualization illustrates the IBEX satellite in Earth orbit (the orbit reaching almost as far as the orbit of the Moon) and pulls out to beyond the heliopause boundary (the true 3-D nature of the boundary is reduced to a 2-D spherical surface). The sphere with the skymap opens to reproject the data into a near-Aitoff type map projection.The skymap shows the measured flux of energetic neutral atoms (ENAs). ||

No man-made object has yet to slip the bounds of our solar system and enter interstellar space. But we can measure some of the atoms that make their way into the solar system from the outside. Crossing this boundary, they travel 7.5 billion miles over 30 years until some of them hit the detector on NASA's Interstellar Boundary Explorer (IBEX) satellite. In 2009 and 2010, IBEX detected neon and oxygen atoms, and in doing so gave scientists the most complete glimpse yet of interstellar material. The results? It's an alien environment out there. The interstellar material has less oxygen in any given slice than anywhere in our solar system. This suggests that the solar system evolved in a separate, more oxygen-rich part of the galaxy or that critical, life-giving oxygen lies trapped in interstellar dust grains or ices. Either way, this affects our understanding of how the solar system, and life, formed. Watch in the videos below to see how IBEX detected this "alien" material. ||

This visual presents a color-coded full-sky neutral atom map in a Hammer projection. This map is different from earlier IBEX maps in that it shows atoms only at energies where the interstellar wind is the brightest feature in the maps. In Earth's orbit, where IBEX makes its observations, the maximum flow (in red) is seen to arrive from Libra instead of Scorpio because the interstellar wind is forced to curve around the Sun by gravity. ||

IBEX found that Energetic Neutral Atoms, or ENAs, are coming from a region just outside Earth's magnetopause where nearly stationary protons from the solar wind interact with the tenuous cloud of hydrogen atoms in Earth's exosphere. ||

In this image set, the brighter stars from the Tycho skymap have been reprojected into positions corresponding to the coordinate system used by the IBEX mission.The colors represent the number of neutral atoms (in the specified band of energies) detected by IBEX in each block of sky. Each block in the map is roughly a square about 6 degrees by 6 degrees (or the width of 12 full Moons, on a side). For the energy band displayed of 2.73 keV, violet corresponds to undetectable emission, while red corresponds to the detection of about 50 atoms per second per square centimeter in the angular segment of the sky. There is a 'hole' in the data (black) created when the IBEX scan cuts through the Earth's magnetotail.The images in this set have been co-registered for easy compositing. ||

The camera view moves from the heliosphere 'nose', the apparent direction of the heliopause relative to the interstellar wind, towards the 'knot'. The 'knot' represents a direction of high emission of neutral atoms which has changed significantly in the six months since the first IBEX map.We fade-in an artistic conception of the 'knot', which untangles during the six months as we fade to the second IBEX map. ||

Surrounding our solar system is a giant protective bubble created by particles and magnetic fields from the Sun called the heliosphere. Every 11 years, the Sun’s activity ramps up and down in what’s known as the solar cycle. As the Sun reaches its peak activity level, called solar maximum, the heliosphere expands. During this time, the heliosphere’s protective shield is strengthened by the increase in particles and magnetic fields from the Sun. As a result, fewer damaging particles from the galaxy, such as galactic cosmic rays, are able to penetrate into the heliosphere. As the Sun ramps down into a low level of activity, called solar minimum, the heliosphere shrinks and more cosmic rays are able to enter the heliosphere. ||

Our solar system is nestled inside the Milky Way galaxy, home to more than 100 billion stars. Stretching for millions of miles around the solar system is a protective bubble called the heliosphere. Created by particles and magnetic fields from the Sun, the heliosphere separates our solar system from the vast galaxy beyond — and much of its harsh space radiation that can be damaging to life on Earth. ||

The sun sends out a constant flow of charged particles called the solar wind, which ultimately travels past all the planets to some three times the distance to Pluto before being impeded by the interstellar medium. This forms a giant bubble around the sun and its planets, known as the heliosphere. NASA studies the heliosphere to better understand the fundamental physics of the space surrounding us - which, in turn, provides information regarding space throughout the rest of the universe, as well as regarding what makes planets habitable.The solar wind is a gas of charged particles known as plasma, a state of matter governed by its own set physical laws just as the more common solids, liquids, and gases are. As the solar wind sweeps out into space, it creates a space environment filled with radiation as well as magnetic fields that trail all the way back to the sun. This space environment is augmented by interstellar cosmic rays and occasional concentrated clouds of solar material that burst off the sun, known as coronal mass ejections.This complex environment surrounds the planets and ultimately has a crucial effect on the formation, evolution, and destiny of planetary systems. For one thing, our heliosphere acts as a giant shield, protecting the planets from galactic cosmic radiation. Earth is additionally shielded by its own magnetic field, the magnetosphere, which protects us not only from solar and cosmic particle radiation but also from erosion of the atmosphere by the solar wind. Planets without a shielding magnetic field, such as Mars and Venus, are exposed to such processes and have evolved differently.NASA's studies of the heliosphere include research into: how the solar wind behaves near Earth; what causes and sustains magnetic and electric fields around other planets; how does the heliosphere interact with the interstellar medium; what do the boundaries of the heliosphere look like; what is the origin and evolution of the solar wind and the interstellar cosmic rays; and what contributes to the habitability of exoplanets.The field is, therefore, intensely cross-disciplinary. Heliospheric research often works hand in hand with planetary scientists, astrophysicists, astrobiologists, and space weather researchers.NASA heliophysics missions contributing to heliospheric research are: the Advanced Composition Explorer; NOAA's Deep Space Climate Observatory, the Interstellar Boundary Explorer, the Solar Terrestrial Relations Observatory; Voyager, and Wind. ||

Animation showing Heliotail solar winds. || heliotail animation || Heliotail_0090000877_print.jpg (1024x576) [68.7 KB] || Heliotail_00900_web.png (320x180) [55.2 KB] || Heliotail_00900_thm.png (80x40) [5.5 KB] || heliotail.webmhd.webm (960x540) [3.5 MB] || Helio (3840x2160) [64.0 KB] || heliotail.mp4 (3840x2160) [16.2 MB] ||

This animation shows how variations in the size of the heliosphere affect how many cosmic rays reach Earth. As the heliosphere expands, it blocks more cosmic rays, and as it contracts, more cosmic rays get through and can affect astronauts and satellites. ||

This animation shows the heliosphere expanding and contracting in response to the solar cycle. As the sun reaches solar maximum, the solar wind increases and expands the heliosphere. During solar minimum, the heliosphere contracts. ||

This is an updated version of an older animation. Starting with a view of our Milky Way galaxy, the orange gas in the animation represents the interstellar medium. The bow shock is created because the heliosphere is moving through like a boat through the water, crashing through the interstellar gases. ||

This animation is an update HD version of #010149 that starts at the Sun and pulls back to reveal the Heliosphere. ||

Starting with a view of our Milky Way galaxy, the orange gas in the animation represents the interstellar medium. The bow shock is created because the heliosphere is moving through like a boat through the water, crashing through the interstellar gases. ||