Starship Asterisk*

pacfandave wrote:Silly me . . . I thought Andromeda was our closest galaxy. What--it's not "active?"

. The black hole in the center of a galaxy must be feed by matter to emit radiation. The galaxy is then active. Andromeda is not active because there is'nt an accretion disk around his central black hole.

I believe it's the Sierra Leone and LIbéria coast.

There is another X in the Sea of Serenity, as you can see at the bottom of this picture taken the same day (3 mars) at 19h. Is this X real? I dont see the false X on the APOD picture and on my picture.
Donald Pelletier, cégep de Valleyfield

He show me his calcul base on angle, 12%.
If you take the variation between a typical full moon and the extremes, the result is 12,5%, than writing about 15% is ok.

One of my student tell me that the phrase "about 30 percent larger in area" is incorrect. It's not. He forget to read AREA! At perigee, the distance between the moon and the earth is 363 300 km, for an angle of 0,55°. At apogee, the distance is 405 500 km, for an angle of 0,49°. The variat...

Replacing the discovery of Saturn's ring by the observation of sunspot will be the exact list of what we reed in introductory textbook. This link is a good source : http://www.astro.umontreal.ca/~paulchar ... ers_e.html

Thackeray discover the Bok globules in IC 2948. It is Bart Bok who first first drew attention to such objects in 1947. So, yes, this dark region are Bok globules. (ref: http://hubblesite.org/newscenter/archiv ... k/2002/01/)