Follow the reluctant adventures in the life of a Welsh astrophysicist sent around the world for some reason, wherein I photograph potatoes and destroy galaxies in the name of science. And don't forget about my website, www.rhysy.net



Monday, 28 March 2016

Ask An Astronomer Anything At All About Astronomy (XXI)

More questions.


1) Are rogue stars and planets created by galaxy collisions ?
Star yes, planets no.

2) If we replaced the Sun with another star during a collision with another galaxy, would we all die ?
Yes. Yes we would.

3) Do black holes convert energy into mass ?
No.

4) Why do black holes bend space ?
Black holes hate space and are engaged in an ongoing war to destroy it. They hope that if they bend it enough they'll break it. The reason is that they had a big argument a few billion years ago (something to do with whether or not infinity is a physically meaningful concept) and neither side has yet been able to outwit the other.

5) If space was curved enough could I see the back of my own head ?
Yeah, but just use a mirror, OK ? Seriously, you can pick one up for like £1. Leave space alone.

6) How do we know space is curved ?
Because Science.

7) If a star dies , does it still have the same mass ?
Not usually.

8) If a star becomes a black hole does its mass increase ?
It can if it wants to.

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