Answers to Physics Questions

I've heard that muscles can waste in space because of decreased gravity. Does that mean astronauts return to Earth...

How much energy is in moonlight, and could solar panel technology be used to capture this energy?

I know there have been many missions to the moon and it's incredible to think humans have walked on its surface!...

Izzie Clarke has been investigating this colourful conundrum from David.

Is it real or just a special effect in movies and cartoons?

If the sun was to disappear instantly, would the gravitational effect on the Earth be instant? In other words, the...

If we incorporate Einstein's laws of relative, shouldn't the Universe's age change depending on where...

Is the Universe endlessly repeating itself? Is the Universe endlessly repeating itself?

If fragments of Mars have landed on Earth, could the reverse be true?

If we had a telescope powerful enough to see all the way back to the Big Bang, what direction should we point it?

When should you replace your bulbs: as they break or as soon as possible?

What's the minimum number of photons our eye can detect?

At what altitude above the Earth is zero gravity experienced?

What will the Event Horizon Telescope see?

If I jumped just before the elevator hit the ground would it mitigate the effects on my body?

What's so special about the size of the Earth that makes life more likely?

Would a mirror lightyears away in space show us our planet's ancient history?

How do we get back to earth from the moon?

What's the difference between a US and a UK billion?

Why don't lightning strikes on the ocean kill marine life?

Seeing as Earth is just right for life, does that make hunting for ET futile?

If pi just keeps going, how do we keep finding more numbers?

Can we make gravity by spinning a spaceship?