Category | Astronomy Cast

By Astronomy Cast on November 11, 2019 in
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Things used to be so simple. Comets were snowballs from the outer Solar System, and asteroids were rocks from the inner Solar System. But now everything’s all shades of grey. Astronomers have found asteroids that behave like comets and comets that behave like asteroids.

By Astronomy Cast on November 4, 2019 in
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Proving, once & for all that there’s alien life on another world. It should be straightforward, look for biosignatures, but it looks like there are natural sources that could explain almost any chemical we could hope to search for.

By Astronomy Cast on October 28, 2019 in
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Our series on Universe weirdness marches on. This week we take a look at the habitable zone, and how things aren’t as simple as we thought.

By Astronomy Cast on October 21, 2019 in
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Our series on Universe weirdness continues, this time we learn how astronomers are struggling to make sense of the age of the Universe.

By Astronomy Cast on October 14, 2019 in
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Astronomers have been trying to accurately measure the expansion rate of the Universe. It’s been tough to nail down, and now astronomers are starting to figure out why.