Just 4,000 light-years from Earth is a strange, star-sized object. It’s been observed by radio telescopes, but astronomers aren’t sure what it is. They call it a long period transient.Continue reading “Astronomers Discover a Mysterious Star That Flashes Every 20 Minutes. But What is it?”
The center of the Milky Way is a mysterious place. Astronomers think there’s a supermassive black hole there, though it could be dark matter instead. The region is densely packed with stars, dominated by red giants. And because of all the dust between Earth and the galactic center, we can’t see anything with visible light, ultraviolet light, or low-energy x-rays.
But we can detect radio waves, and there are some unexplained ones coming from the center of the galaxy, and adding to the mystery.Continue reading “What’s Causing the Mysterious Radio Waves Coming From the Center of the Milky Way?”
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This is our second episode in a two part series where we look at Transients in astronomy. In last week’s episode, we talked about things that change here in our own Solar System. Now we’ll talk about everything else in the Milky Way and beyond.
Continue reading “Astronomy Cast Ep. 520: Transients: What They Are and Why They Matter Part 2”
Astronomers have found that sometimes the Universe changes. Things move, things explode, things get brighter or dimmer. In fact, knowing this has helped astronomers discover some very important aspects of the Universe. Today we begin a two part series on Transients and their role in astronomy.
Continue reading “Astronomy Cast Ep. 519: Transients: What They Are and Why They Matter”