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I've closed this wall for comments now. Thanks for all your questions :-)

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I've closed this wall for comments now. Thanks for all your questions :-)

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We don't know.

We have some ideas e.g. Gravity may be repulsive

at long distances, or there may be a thing called

"dark energy", but they're just ideas.

It may be that it isn't really accelerating, but just

looks like that from here.

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Why is the universe expanding at an accelerating rate?

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The Moon is orbiting the earth, like a satellite. It's trying to get away in a straight line, but our gravity keeps bending it back - the 2 effects are almost perfectly balanced

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We haven't found anywhere else that humans could live without a spacesuit or in pressurised domes. But we're looking. Try googling "extrasolar planets".

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The rocket is a metal can, like the aircraft you fly in on holiday. But better!

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The Sun uses hydrogen as fuel, not helium.

It's about 4.5 billion years old, and it'll last another 4.5 billion years.

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Yes.

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So far, our furthest device is Voyager 2, which has taken 36 years to get to the edge of the solar system. see this link:

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This meter depicts readings by Voyager 1's cosmic ray instrument. The instrument detects charged particles that dominate inside the bubble our sun blows around itself (green) and charged particles that dominate outside our solar bubble (orange). Data from this instrument suggested that Voyager 1 entered interstellar space on Aug.

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Yes. I've shown you video clips of people doing it.

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We don't know. All we can really talk about is "the observable universe".

Ask me what that means :-)

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A couple of degrees above absolute zero.

Pretty chilly.

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We discussed this in our next lesson. The earth is spinning, and also moving round the Sun, which is moving round our galaxy, which is moving fast as the universe expands...

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We discovered a whole lot more small

objects out there, and in 2006 decided that

Pluto didn't count after all. So we invented the

name "dwarf planet" for all those objects. Shame!

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Lots.

See this link:

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HubbleSite: Black Holes: Gravity's Relentless Pull interactive: Encyclopedia

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Black Holes: Gravity's Relentless Pull. Information, virtual journeys, and simulations about black holes from the Space Telescope Science Institute

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How do we know that space is endless

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Why the moon doesn't hit the earth

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how do you keep the oxygen inside a space rocket?

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can you spray aerosols in space?

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what is the speed of the Earth and other planets comparing to the Earth?

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is there a limited supply of helium of which sun consist? If yes, than when is it going to end?

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is there any planet in the space , on which human beings can exist?

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why is the Pluton not a planet any more?

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How many black holes are in the space?

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what is the longest distance that modern rockets can travel?

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What is the temperature in the space?

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Can you stand on the moon

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We don't know.

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It's bacteria and fungi that make things

go mouldy. Space is like a giant freezer,

so bacteria & fungi would be stopped

in their tracks. Depending on the type

of food, it might "froth up" as air bubbles

expand before it freezes. Wait until we

study pressure, soon :-)

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Episode 1. Blackholes Basics - What is a Black Hole? Animation

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Music: While she sleeps (morning edit) by The Lights Galaxia Introduction to Blackholes in a 6-part mini-serious. Episode 1 - What is a black hole?

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what is a black hole and how does it work

and how is it formed

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Do alians have little villages and cityies on other planets, and do they have pets and eat meat and vegatable?

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why cant you breath in space and if you threw a

ham sandwich or any sandwich into space would

it go mouldy because space is pretty cold, and so

would it act like a freezer???????

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How can you eat and drink in space