Magazine | Page 195 of 278 | Astronomy.com

Stephen James O’Meara’s Secret Sky: Extreme observing: naked-eye galaxies

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

Does flying in a plane underneath the aurora expose a person to radiation? Would it be dangerous?

Is it possible for a large star to collapse itself out of existence rather than just forming a black hole?

Telescopes and Equipment

I have a 70-millimeter refracting telescope. Would a scope with a larger diameter make objects look bigger or closer?

David H. Levy’s Evening Stars: A Bonanza night

Bob Berman’s Strange Universe: Can you imagine?

Bob Berman’s Strange Universe: A dozen cool facts

I read somewhere that mercury is being used to make liquid-mirror telescopes. What are the advantages of collecting light this way?

Do black holes and their accretion disks always spin in the same direction? Does a supermassive black hole always spin in the same direction as its host galaxy?

David H. Levy’s Evening Stars: Kingston’s astronomical dynamo

Saturn’s rings are said to contain chunks of icy debris as big as cars. Why are none of the larger particles visible in the Cassini photos?