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Crash Course Astronomy

Star Clusters: Crash Course Astronomy #35

Crash Course Astronomy

Star Clusters: Crash Course Astronomy #35

10m 21s

Last week we covered multiple star systems, but what if we added thousands or even millions of stars to the mix? A star cluster.

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12m 42s

Neutron Stars: Crash Course Astronomy #32

In the aftermath of a 8 – 20 solar mass star’s demise we find a weird little object known as a neutron star. Neutrons stars are incredibly dense, spin rapidly, and have very strong magnetic fields. Neutrons stars with the strongest magnetic fields are called magnetars, and are capable of colossal bursts of energy that can be detected over vast distances.

Available to viewers in US and Canada
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12m 2s

Low Mass Stars: Crash Course Astronomy #29

Today we are talking about the life -- and death -- of stars. Low mass stars live a long time, fusing all their hydrogen into helium over a trillion years. More massive stars like the Sun live shorter lives. They fuse hydrogen into helium, and eventually helium into carbon. When this happens they expand, get brighter, and cool off, becoming red giants.

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11m 49s

Exoplanets: Crash Course Astronomy #27

Phil explains that YES, there are other planets out there and astonomers have a lot of methods for detecting them. Nearly 2000 have been found so far. Exoplanets appear to orbit nearly every kind of star, and weÕve even found planets that are the same size as Earth. We think there may be many billions of Earth-like planets in our galaxy.

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