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| [00:00:05.12] | M31, the Andromeda Galaxy, is the closest galaxy like our own |
| [00:00:12.18] | ♪Music♪ |
| [00:00:14.29] | Now, NASA's Fermi mission reports a strange gamma-ray signal at its center |
| [00:00:21.33] | ♪Music♪ |
| [00:00:26.43] | This could be a signal of mysterious dark matter |
| [00:00:32.53] | Or the collective glow of many spinning neutron stars, called pulsars |
| [00:00:39.66] | Astronomers don't yet know |
| [00:00:45.77] | Fermi has found a similar unexplained signal at the center of our own galaxy |
| [00:00:51.86] | By exploring M31, Fermi may be able to tell us what's going on much closer to home |
| [00:00:59.96] | [Beeping] |