Starship Asterisk*

Does the pink color of the stars indicate that they are all rich in sulfur at the surface?

If the earth is safe for the next 100 years, then what about Mars and Venus? If there were an impact on one of our neighbors, it would afford many interesting research possibilities.

Why does the edge of earth's shadow appear to move across the moon's face from 7 o'clock to 1 o'clock beginning the eclipse, but from 5 o'clock to 11 o'clock ending the eclipse?

Looking at the APOD (3/9/17), and thinking of the HUDF (12/9/04) and the Sloan digital sky releases (10/28/03), I started wondering if there are any objects whose red shift indicates they are approaching our galaxy. Does anyone know the answer to this question? Are these approaching objects evenly d...

Putting your cursor over the picture will highlight the central required location for the missing companion star. Could anybody explain to me why the red hydrogen "bubble" is not spherical or why the "central required location" is not in the center of the 2-D image projection? If...

Is that snow in Hawii in the foreground?

http://apod.nasa.gov/apod/ap090219.html