News tagged with years

Sail past Orion to the outer limits of the Milky Way

Several nights ago the chill of interstellar space refrigerated the countryside as temperatures fell well below zero. That didn't discourage the likes of Orion and his seasonal friends Gemini, Perseus and Auriga. They only ...

dateDec 01, 2014 in Astronomy
shares0 comments 0

Herschel observes Andromeda's past and future stars

Recently, the infrared Herschel Space Observatory, has taken a series of beautiful high-resolution infrared images of Andromeda. It is the first time we can see M31, at these wavelengths, at such a high resolution. The quality ...

dateDec 01, 2014 in Astronomy
shares0 comments 1

Image: The Pillars of Creation

The Pillars of Creation (seen above) is an image of a portion of the Eagle nebula (M16) taken by Hubble Space Telescope in 1995. It soon became one of the most iconic space images of all time. The Eagle nebula is a stellar ...

dateOct 01, 2014 in Astronomy
shares0 comments 1

How small can galaxies be?

Yesterday I talked about just how small a star can be, so today let's explore just how small a galaxy can be. Our Milky Way galaxy is about 100,000 light years across, and contains about 200 billion stars. The largest known ...

dateSep 29, 2014 in Astronomy
shares2 comments 27

Measuring the proper motion of a galaxy

The motion of a star relative to us can be determined by measuring two quantities, radial motion and proper motion. Radial motion is the motion of a star along our line of sight. That is, motion directly toward us or away ...

dateSep 23, 2014 in Astronomy
shares0 comments 1