Glossary of Astronomy Terms. The universe is a large place full of wondrous and unimaginable things. The amateur astronomy hobby contains words, labels, and technical terms that may seem be a little confusing for both beginners and the more experienced hobbyists. This glossary of astronomy terms contains definitions for some of the most common words used in astronomy, cosmology, astrophysics, and space exploration. You may click on any yellow highlighted word to jump directly to the definition for that astronomy word. You can also click on any letter of the alphabet below to jump directly to that section in the astronomy glossary listing.
The lowest energy transfer to Mars is a Hohmann transfer orbit; a mission to Mars using Hohmann transfer involves an approximately 9 month travel time from Earth to Mars, about five hundred days at Mars to wait for the transfer window to Earth, and a Hohmann transfer of about 9 months to return to Earth.
------------------. If you're hoping to be one of those first human interplanetary explorers, you might want to know: how long does it take to get to Mars? The journey from Earth to Mars takes about 300 days.Every two years Mars is at its closest point, only 55 million km from Earth, and it's the ideal time to send a spacecraft. Travel time depends on the positions of the planets and how much fuel you're willing to burn.When you're trying to get to Mars, just like in a car, spending more fuel means a shorter travel time.The first spacecraft to make this journey was NASA's Mariner 4, launched on November 28, 1964 and arrived 228 days later.-----------------. If you're hoping to be one of those first human interplanetary explorers, you might want to know: how long does it take to get to Mars? The journey from Earth to Mars takes about 300 days.