Mysterious Signal From the Perseus Cluster

More excitement brought to you by astronomy!

Video: Star-Crossed Galaxies

Neil deGrasse Tyson Reads Some Walt Whitman

I love this!

In Celebration of Carl Sagan: Crowdsourced Blue Dot

The Hubble Ultra Deep Field in 3D

These stunning and humbling images leave you thinking about your tiny place in the universe.

Y is for Yellow Sun

Our yellow sun is an average star.  In the cosmic sense of things, it isn't anything special, though it will always be special to us since it keeps us alive from day to day.  Even though it is decidedly average, there are a lot of things about the sun that you may find quite interesting.  Have a look!

The following is a time lapse video of the sun.  It's kind of neat to see how the surface of the sun changes over a period of time.

X is for X-Ray Astronomy

X-rays have a shorter wavelength and higher frequency than visible light.  Most people encounter x-rays for the first time in a medical setting, but x-rays are extremely useful for astronomical purposes as well.  That's because plenty of objects emit x-rays.

Here's a video that discusses the history, present, and possible future of x-ray astronomy.

W is for Wavelength

Electromagnetic waves bombard us from every direction each second of every day.  One of the important properties of EM waves is the wavelength. We can only visually observe waves of a certain wavelength, which is often referred to as the visible spectrum.  

To learn more about the higher and lower wavelength EM waves you cannot see, watch the video below.

The following video gives a brief explanation of the Doppler Effect, which deals with the shift in wavelength observed when the object emitting the waves is in motion relative to an observer.