The Alternative Night Sky - Another Time - Another Place

  • Released Tuesday, August 1, 2017
  • Updated Monday, September 18, 2017 at 3:51PM
  • ID: 4451

No description available.

A low-magnitude threshold version of the skymap. The threshold magnitude is 3.0 so the galactic disk is very faint. Good for when you just want the brighter stars and have a wide field of view.

Periodically our group needs to generate visualizations of another location in the galaxy, or another time in the galaxy. For context to make the view more appealing, we might like to include background stars - but showing our standard view of the night sky from Earth just seems not quite right. And then there are some (like this author) who sometimes want to make a big deal about such details, so why don't I just solve the problem.

This texture is built from the Tycho Catalog skymap. The same stars are included, but the brighter stars are repositioned by computing a random offset from their usual positions. This alters the star patterns to less recognizable forms while keeping groups of fainter stars, such as the Milky Way, intact. This technique does keep a number of the dust lanes in the galactic disk intact.
No description available.

A higher-magnitude threshold version of the skymap. The threshold magnitude is 4.0 so the galactic plane is fainter and bright stars are smaller than the map above. Better for smaller fields-of-view.

No description available.

A high-magnitude threshold (almost all stars visible to the naked eye) version of the skymap. The threshold magnitude is 5.0 so the galactic plane is very bright and bright stars are large. Best for smaller camera fields of view to show fainter stars.


Please give credit for this item to:
NASA's Scientific Visualization Studio


This visualization can be found in the following series:

Datasets used in this visualization

Hipparcos Hipparcos Catalogue (Collected with the Telescope sensor)
Hipparcos Tycho Catalogue (A.K.A. Tycho 2 Catalogue) (Collected with the Telescope sensor)

Note: While we identify the data sets used in these visualizations, we do not store any further details nor the data sets themselves on our site.

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