Monday, January 16, 2012

Red Giant Galaxies

            So we have all heard of the way a star is born and the many phases it can take.  Some go from blue to yellow, to red, to black; while others go to red, to white or brown.  To an average person this language seems like silly talk.  To astronomers, you understand that these different color coatings are sun stages from blue stars to dying Red Giants; to Black dwarfs/Holes or White/Brown Dwarfs.  But has anyone ever seen a Red Galaxy as dying?
            A survey conducted at the ALMA Observatory showed that as a galaxy nears its end, it turns red and becomes elliptical, unlike stars that become Red Giants.  However, they explain that the reason these galaxies have entered this stage of life is due to the fact that their supermassive Black Holes.  They appear to be eating away all the star dust used to form new stars and cause the galaxies to starve for star dust.


Makes you wonder, how long has the Milky Way been starving of our nutrients?

Thursday, January 12, 2012

What is Astronomy?

            When people think of astronomy, they think of a person looking up at the stars with a telescope and knowing all there is to know about where stars and constellations are.  Though it is partially just a tiny bit of the reality of it, that is all they get to see from outside of that environment.
            When seen in action it is a whole different story but what is it? What drives people to just “look at the stars” for hours on end?  What IS this thing called astronomy? In my opinion, when I hear that we are “looking into our past,” I find that statement incorrect.  We understand that everything we see happened many, many light years ago and is old news over there.  While over hear it is a breakthrough in the study of the stars, I believe that what astronomy does is not look at our past but our future. 
            Sometimes we see something that pleases us for instance the creation of stars in Nebulas such as the Orion Nebula or the Horse Nebula (also located in the constellation Orion).  However, most of the time we find events such as meteor impacts or stars explosions (supernovas) that get us to thinking what are the chance of this happening here?  We see the focus change of what happened in order for this event to occur, into what is happening now that will cause it here.