Astronauts on Mars. Artwork of astronauts on Mars with a United States flag. The Martian atmosphere is mostly carbon dioxide and surface temperatures are well below freezing. Martian astronauts will have to breathe their own air supply and wear heated spacesuits. Mars is a rocky desert world with no surface water,and gravity is about one third of that on Earth. Human missions to explore Mars have been planned since the 1950s,usually involving a period of 10 to 30 years to develop the necessary technology and resources | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Van Ravenswaay, Detlev |
Bildgröße: | 5315 px × 3543 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |