Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope. Stellarium is also used in real planetariums.

Install

Stellarium is available in official Ubuntu repository, but it might be old. To install, use following command in Applications -> Acessories -> Terminal:

sudo apt-get install stellarium stellarium-data

You can alternatively download the latest Ubuntu package from: https://launchpad.net/ubuntu/+source/stellarium

After installed Stellarium,launch from Applications -> Science menu.

In addition,get the user’s guide in PDF.

Features:

sky
default catalogue of over 600,000 stars
extra catalogues with more than 210 million stars
asterisms and illustrations of the constellations
constellations for twelve different cultures
images of nebulae (full Messier catalogue)
realistic Milky Way
very realistic atmosphere, sunrise and sunset
the planets and their satellites
interface
a powerful zoom
time control
multilingual interface
fisheye projection for planetarium domes
spheric mirror projection for your own low-cost dome
all new graphical interface and extensive keyboard control
telescope control
visualisation
equatorial and azimuthal grids
star twinkling
shooting stars
eclipse simulation
skinnable landscapes, now with spheric panorama projection
customisability
plugin system adding artifical satellites, ocular simulation, telescrope configuration and more
add your own deep sky objects, landscapes, constellation images, scripts…

Screenshot:

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