APOD 3.5

This picture is of the supernova remnant Simeis 147. Supernovae are when large-mass stars die. Remnants are what is left over after the supernova is finished. In this particular remnant, however, there is a pulsar left over within. Pulsars are very compact stars that shoot beams of radio waves from their magnetic poles. As the star spins, we see the radio light flashing, and the star seems to pulse, hence the name.

APOD 3.4

This is a picture of the constellation Orion. All the stars have been stretched out far to show their colors. All of the stars are blue besides Betelgeuse. That's because Betelgeuse is a red giant star, and all the others aren't. Rigel is the most white, because it is a blue supergiant. Red stars are the coolest, and blue stars are hotter.

APOD 3.3

In this picture, the star Zeta Ophiuchi is seen in the center. The star was flung out, possibly by a companion star that went supernova. it is rushing forward at 24 kilometers per second. The yellow and red streak of dust is being pushed forward ahead of the moving star by the solar wind. This star is an O9 III specral type, and has an absolute magnitude of -3.2, meaning it would be a very bright star, if it's light wasn't obstructed by gases.