Which planet is most similar to Earth?
I was just curious; What planet is most like Earth. In composition, size, in atmosphere, etc?
Venus and Mars are the most like Earth, but in different ways.
In terms of size, average density, mass, and surface gravity, Venus is very similar to Earth.
But Mars is the planet that is most similar to Earth in other ways. A Martian day is just over 24 hours, and its rotation axis is tilted by about the same amount as Earth's. Most interestingly, however, it is thought that at some point in Mars's past, it may have had liquid water on its surface, just as Earth does now. This leads some people to suspect that Mars may have once harbored life.
Get More 'Curious?' with Our New PODCAST:
- Podcast? Subscribe? Tell me about the Ask an Astronomer Podcast
- Subscribe to our Podcast | Listen to our current Episode
- Cool! But I can't now. Send me a quick reminder now for later.
How to ask a question:
If you have a follow-up question concerning the above subject, submit it here. If you have a question about another area of astronomy, find the topic you're interested in from the archive on our site menu, or go here for help.Table 'curious.Referrers' doesn't existTable 'curious.Referrers' doesn't exist
This page has been accessed 89813 times since November 13, 2002.
Last modified: June 4, 2003 9:41:02 PM
Ask an Astronomer is hosted by the Astronomy Department at Cornell University and is produced with PHP and MySQL.
Warning: Your browser is misbehaving! This page might look ugly. (Details)