Colliding stars

I know that likelihood of stars colliding is very low, but have there been papers describing the theoretical process of star collision? James, London I think we can divide star-collision into three classes: Stellar Mergers Binary collisions Stellar Collision Under...

How do we know how massive stars are?

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.

Destroying the One Ring in Space

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.

Meet The Tardigrades

https://www.youtube.com/watch?v=GnYSsSEBZnE There's a creature on earth that can survive the most extreme conditions on (and thanks to humans off) the planet! It's called a tardigrade, but people also call it a “waterbear” or “moss piglet." Tardigrades are...

Back to the Past

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 in space, time has a...

What Would Being In Space Without A Suit Be Like?

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 by astronauts to survive the...

How dangerous is it to cross an asteroid field?

How easy is to navigate through an asteroid field? Do we need to take precautions when we send probes through them? Andrew, Sidney. I'm afraid TV shows and movies have lied to you: asteroid fields are...

What Would Happen If The Sun Disappeared ? – AGAIN!

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 nothingness. My friend Gavin asked online: “Can...

What’s going on with the moons of Jupiter?

The orbit of Jupiter's moons are all messed up and seemingly overlap. Do they interact much? Greg, U.S. Jupiter has 67 confirmed moons. Of these, 8 are regular satellites with nice prograde motion (they move in...
Credit: Wikicommon

PodcAstroholic – Jumping In A Black Hole

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

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