Archive | Stars


Ep. 406: Stellar Cannibalism

Most of the time stars hang around for billions of years. But the Universe is a big place, and anything that can go wrong, inevitably does. Today we talk about what happens when these stars come together. The outcome is violent, and fortunately for you, also interesting. Download the show [MP3] | Jump to Shownotes […]

Continue Reading 0
Hubble Space Telescope. Image credit: NASA

Ep 386: Orbiting Observers

The atmosphere keeps us alive and breathing, but it really sucks for astronomy. Fortunately, humanity has built and launched space telescopes that get above the pesky atmosphere, where the skies are really clear. Let’s take a look at the past, current and future of orbital observation. Download the show [MP3] | Jump to Shownotes | […]

Continue Reading 0

Ep. 332: Stellar Collisions

Out here in the Milky Way’s suburbs, stellar collisions are unheard of. But there are places in the galaxy where stars whiz past each other, and collisions can happen. When stars collide, it’s a catastrophic event, and the stellar wreckage is visible half a galaxy away. Download the show [MP3] | Jump to Shownotes | […]

Continue Reading 0

Ep. 325: Cold Fusion

The Universe is filled with hot fusion, in the cores of stars. And scientists have even been able to replicate this stellar process in expensive experiments. But wouldn’t it be amazing if you could produce energy from fusion without all that equipment, and high temperatures and pressures? Pons and Fleischmann announced exactly that back in […]

Continue Reading 4

Ep. 324: Sun Grazers

Comets can spend billions of years out in the Oort Cloud, and then a few brief moments of terror orbiting the Sun. These are the sun grazers. Some survive their journey, and flare up to become the brightest comets in history. Others won’t survive their first, and only encounter with the Sun. (more…)

Continue Reading 0

Ep. 322: SOHO

As we’ve mentioned before, the Sun is a terrifying ball of plasma. It’s a good thing we’re keeping an eye on it. And that eye is the Solar and Heliospheric Observatory, or SOHO. Operating for more than 18 years now, SOHO has been making detailed observations of the Sun’s activity though an almost entire solar […]

Continue Reading 1

Ep. 319: The Zodiac

Although the Zodiac is best known for astrology nonsense, it has a purpose in astronomy too. The constellations of the Zodiac define the plane of the ecliptic: the region where the Sun, Moon and planets appear to travel through the sky. What are the constellations of the Zodiac, and how do astronomers use them as […]

Continue Reading 2

Ep. 306: Accretion Discs

When too much material tries to come together, everything starts to spin and flatten out. You get an accretion disc. Astronomers find them around newly forming stars, supermassive black holes and many other places in the Universe. Today we’ll talk about what it takes to get an accretion disc, and how they help us understand […]

Continue Reading 0

Ep: 290 Failed Stars

If you get enough hydrogen together in one place, gravity pulls it together to the point that the temperature and pressures are enough for fusion to occur. This is a star. But what happens when you don’t have quite enough hydrogen? Then you get a failed star, like a gas giant planet or a brown […]

Continue Reading 1

Powered by WordPress. Designed by WooThemes