Mergers in G-Major

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There has been a surprising affinity between astronomy and music. Both needed the inspiration of the muses to be performed in Ancient Greece, and expressions like the Music of...
Credit: Wikicommon

How hot or not is a Black Hole?

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Short Answer - the temperature of a black hole is inversely proportional to its mass. For a black hole with the same mass as our Sun the temperature is 60 billionths of a degree kelvin.

What Would Happen If The Sun Disappeared ? – AGAIN!

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In a previous post, I discussed how long the Earth would be able to survive without the Sun. We had to assume that our star would magically disappear into...

Time management.

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"Can you build me a hyperbolic time chamber? I'll buy you a coke." Friend of mine while we were walking down the street. Almost 110 years ago our view of time...

Destroying the One Ring in Space

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I was asked by Larry, one of my students, about what would be the best place in the solar system to destroy the One Ring. Since the 25th of March is the anniversary of its destruction and the fall of Sauron I thought I’d dedicate this vlog to answering the question as seriously and as accurately as possible.
Credit: Wikicommon

Will Earth be sucked in by the Black Hole at the centre of the...

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Is the supermassive black hole at the centre of the Milky Way going to eat the Earth? Ross, UK No, the Earth is not in any danger from the supermassive black...

Stars of the Future

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If the universe continues expanding forever, how long until it's too diffused to allow star formation? How many generations of stars will that mean the universe has? How will...

What’s the speed of Gravity?

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For all intents and purposes gravity travels at the speed of light but it is very hard to measure, and so far we have no direct model-independent measurement of the...

PodcAstroholic – Gravity & Discs

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In this PodcAstroholic we answer the question, if gravity tends to form spheres why are some galaxies shaped like discs?
Credit: Wikicommon

PodcAstroholic – Jumping In A Black Hole

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In this 1 minute PodcAstroholic, we talk about what would happen if you jumped feet first into a black hole.

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