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...
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.

What Would Being In Space Without A Suit Be Like?

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Spacesuits are a fundamental tool for keeping astronauts safe in space, but the protection they supply is often mistaken, exaggerated or romanticised in science fiction.   Spacesuits are garments worn...

Do astronauts age faster or slower in space?

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That is an excellent question, and the answer lies with the two theories of relativity: special and general.

Back to the Past

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Time is a curious dimension. Although we might be still in space, there's no way for us to be still in time. And while we can explore every direction...

Calories in anti-matter

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Dear Mr Science Guy, How many calories would get in a bottle of antimatter? How long would it take to burn off at the gym if you drank it? Thank you, Rob,...

All about the Asteroid Belt

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What does it actually look like in the asteroid belt? Is it anything like as dense as is shown in films? Or is it more like you can see...

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?

How do we know how massive stars are?

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As we discussed in the previous vlog our understanding of stars is still incomplete, but there are areas which we are very confident on what we know. In general we tend to know three things about stars: their brightness, their spectrum, and if they are close enough or of known luminosity, we can also know their distance.

Would I survive a nuclear attack on London by hiding under my mattress?

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Last night I had a nightmare that the centre of London was nuked. In my half-sleep state I tried working out if I could survive just by getting under...