Feb 21, 2008 · Comments and questions about the APOD on the main view screen.

Aug 25, 2011 · An artist's depiction of flying into this system is shown in the above video. In the future, more sensitive data taken over longer time periods may extend the star-wobble …

Oct 14, 2011 · As alert APOD viewers know, a couple of times a month or so, an image that previously appeared on APOD may be rerun, usually on a Sunday, possibly with updated text …

Apr 8, 2009 · There are images like this, but they aren't very aesthetic, so you don't find them in common distribution, or showing up often on APOD. People want to see the whole, majestic …

The ability to track stars so close to the galactic center can accurately measure the black hole's mass and perhaps even provide an unprecedented test of Einstein's theory of gravity as …

Aug 19, 2011 · NASA-Swift article wrote: Astronomers refer to galaxy centers exhibiting such intense emission as active galactic nuclei (AGN). Yet as common as monster black holes are, …

May 11, 2009 · Oooooooooooh! Lovely! APoD 11/1/9. by SittingDownMan » Sun Jan 11, 2009 8:14 am I want to *go* there!

Feb 19, 2010 · I noticed that there is no image for 2008-02-15, only a broken link. Were you aware of this? neufer Vacationer at Tralfamadore Posts: 18805 Joined: Mon Jan 21, 2008 1:57 …

May 7, 2012 · The mass ranges of normal stars, white dwarf stars, and neutron stars are pretty well constrained by modern astrophysics. Not so the mass range of black holes, those …

Mar 9, 2012 · APOD: The Seagull Nebula (2012 Mar 08) by APOD Robot » Thu Mar 08, 2012 5:05 am The Seagull Nebula Explanation: A broad expanse of glowing gas and dust presents …