#749: Dark Energy Changing Over Time

We thought Dark Energy was constant, but new results from DESI say maybe not, and if it wasn’t the Hubble Tension would be easier to solve.

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Fraser Cain
Universe Today

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CosmoQuest

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Ep. 582: Building Bigger Black Holes

Ep. 582: Building Bigger Black Holes

Did you hear the news? Nobel Prizes for black holes. We know there are stellar mass black holes and supermassive black holes, but how do you get from one to the other? How do black holes get more massive?

Ep. 581: Other Kinds of Novae

Ep. 581: Other Kinds of Novae

Don’t ever accuse us of not comprehensively covering every kind of exploding star. This week we gather up all the leftover ways that stars partially or fully explode, or don’t. Probably. Enjoy.

Ep. 580: Exploding Dwarfs

Ep. 580: Exploding Dwarfs

You’d think that a white dwarf star is the end of a stellar life. It’s all downhill from there. A long, slow cool down towards the end of everything. But in some situations, even dead stars can get exciting again, briefly becoming some of the brightest objects in the Universe. And just maybe, the last exciting thing that ever happens in the Universe.

Ep. 579: White and Black Dwarfs

Ep. 579: White and Black Dwarfs

I’ve got some bad news for you: stars die. At some point in the next few billion years or so, our Sun is going to start heating up, using up all the fuel in its core, and then eventually die, becoming a white dwarf. It will then slowly cool down to the background temperature of the universe, becoming a black dwarf.

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