Rotating Question Curious About Astronomy? Ask an Astronomer

Do you believe in UFOs?

If you mean alien spacecraft visiting Earth, then the answer is no. There are probably many, many civilizations in the universe, but the distances between them are just as, well, astronomical. Interstellar space travel is not likely to be economical for any civilization recognizable as such. Aside from that, there has never been any physical evidence of alien spacecraft on Earth, or, indeed, reliable evidence of any kind.

April 1999, Dave Kornreich (more by Dave Kornreich) (Like this Answer)

Still Curious?

Get More 'Curious?' with Our New PODCAST:

Related questions:

More questions about SETI and Extraterrestrial Life: Previous | Next

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 30122 times since April 25, 2002.
Last modified: February 2, 2004 5:00:21 PM

Legal questions? See our copyright, disclaimer and privacy policy.
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)