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solar system

Is everything in space spinning in the same direction?

... come to the party to make the star, they add all of their own bit of spin and the average, when you sum it all up, some ... the planets be spinning the same way? And what about our own solar system - is everything spinning the same way in our own solar system? Matt - So many questions. Okay. So, this ...

The first stars in the Universe turn on at about 400 million years after the Big Bang. WMAP data reveals the era.

Was dark matter created with the Big Bang?

... be put together then there can exist things beyond our own universe and dark energy can be some kind of phenomenon that is related to stuff beyond our own universe. And so, once you have that, you could start to ... dark energy, maybe it is something that is outside our own universe that in some sense, you can say, exists ...

Sun

How do we know that the sun rotates on its own axis?

... implications. How do we know that the sun rotates on its own axis as it's a ball of fire? It's difficult to look into ... ball of fire, so how do we know that it rotates on its own axis? How do we know that the sun rotates on its own axis? ...

Are some galaxies moving so fast as to be invisible?

... fly away from us in the exact opposite direction of our own galaxy. If these galaxies and our own accelerate there should be cases where the speed relative ...

Can a moon have a moon?

... be scarily easy - if a star were to pass too close to our own. Stripping the moon off the earth, we think that will ...

Why are astronomical objects usually spherical?

... The simple answer is it's down to gravity. If we take our own solar system as a really good example, you have the Sun ...

Why is there so much radiation in space?

... maelstrom of cosmic radiation which is streaming off our own sun. If we didn't have the magnetic field of the Earth to ...

The first stars in the Universe turn on at about 400 million years after the Big Bang. WMAP data reveals the era.

What happens when a neutron star collapses?

... and it cools down a bit. It starts to collapse under its own gravity. Stars which are massive enough then start to ...

This stellar swarm is M80 (NGC 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy. Located about 28,000 light-years from Earth, M80 contains hundreds of thousands of stars, all held together by their mutual...

Why is space cold when it has so many stars?

... these extreme temperatures if they're so far away from our own experience of space? Ryan - So, the temperature of just ...

How strong a cable could be used to stop the moon moving away from Earth?

... that we know of, is not strong enough to support its own weight to travel up to a geosynchronous satellite. To go ...

space

What is a Nebula?

... that galaxies were, kind of, whirly clouds inside of our own Milky Way. But now we of course understand that they are ...

Why didn't light from this distant object pass us when we were closer?

... evolving in slow motion and so, though the galaxy, in its own reference has only evolved for half billion years. In our ...

 The Great Red Spot as seen from Voyager 1 This dramatic view of Jupiter's Great Red Spot and its surroundings was obtained by Voyager 1 on February 25, 1979, when the spacecraft was 5.7 million miles (9.2 million kilometers) from Jupiter. Cloud...

What would happen if I moved to Jupiter?

... of GPS satellites that orbit the Earth each have their own clock on board, which broadcasts its signal to receivers, ...

Sand

More stars in the Universe, or sand on Earth?

... get a rough idea. Which is lucky because using Michael’s own estimate counting the Sahara sand would take every single ...

planets

Would we be able to see rogue planets?

... be visible? So, planets that get booted out of their own system, then wander aimlessly through space. Can this ...

Colourful image of the Universe

Does dark matter have structure?

... matter affixes itself to, or does dark matter have its own independent structures - meaning is there a dark universe ...

Is time infinite?

Why is a day divided into 24 hours?

... 1970) up to the current time in seconds and that has it's own problems because, actually, the solar year and the solar ...

Astronaut Buzz Aldrin poses for a photograph beside the United States flag

What would happen if I peed on the moon?

... billion. The pee suddenly finds itself way above it’s own boiling point and has to immediately boil into steam. Tom ...

gravitational lensing

Is dark matter really there and how do we know?

... an antiparticle which we the positron, but a photon is its own antiparticle, it doesn’t have a different antiparticle. ...