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.
ALSO READ: 1 lakh people apply for a one-way trip to Mars, mission to cost $ 6 bn Here are 10 things you should know before you decide to travel to Mars. 1) Where is Mars? Mars is the fourth planet from the Sun and the second smallest planet in the Solar System. Mars orbits the sun at an average distance of 141 million miles, taking 686.93 Earth days or 1.8807 Earth years to complete a revolution.