Starship Asterisk*

In neufer's 8:15 AM post above, a Wiki article is referenced that states: Over a very long time, a white dwarf will cool to temperatures at which it will no longer be visible, and become a cold black dwarf Then after the graph, mention of a "black body" is made. I don't understand the conn...

But now I have what probably seems like a dumb question but: From the original text .. Because that matches Earth's rotation period, it is known as a geosynchronous orbit. If that orbit is also in the plane of the equator, the satellite will hang in the sky over a fixed location in a geostationary o...

This photograph was a great "learning-lesson" for me. I think that it was taken in the northern hemisphere, looking south with the camera and stars sweeping westward to the right ((?))... It took me a while to realize why the geosync'd satellites left trails and the stars didn't. And thank...

Opposition means that the earth is between the sun and Vesta. Conjunction means that the sun is between the earth and Vesta. Is there a word that describes the situation when/if an object (other than the moon, Venus or Mercury) is between the sun and the earth? After many months of visiting APOD an...

I wonder if the little moon's odd shape causes it to tumble or spin in its orbit .....