Ask Astro | Page 18 of 22 | Astronomy.com

Is it true that there are more stars in the universe than there are grains of sand on Earth? How could one calculate such figures?

Ask Astro web extra: What is the Sun’s hottest temperature?

Ask Astro web extra: What are the surface conditions like on Uranus?

Ask Astro web extra: What would the Sun’s rays do to Earth if the ozone layer was no longer present?

Ask Astro web extra: What happens to matter that falls into a black hole?

Ask Astro web extra: What is the nearest star to the Sun? How far away is it?

Ask Astro web extra: How warm does it get on Mars?

Ask Astro web extra: Why does the Moon look so large sometimes as it rises on the horizon?

Ask Astro web extra: What is the difference between astronomy and astrophysics?

Ask Astro web extra: What is the difference between an open cluster and a globular cluster?

Ask Astro web extra: How do X-ray telescopes work?

Ask Astro web extra: What is the difference between a nova and a supernova?