space

Home » space

What’s the atmosphere? Weather science

By |2018-09-23T20:18:36+00:00August 19th, 2017|Physics|

Earth's atmosphere: Did the Earth look like this right after it cooled down? What is the atmosphere? The atmosphere is the air that is wrapped all around a planet. Read more about planets Do all planets have atmospheres? Not all planets have atmospheres. In order to have an atmosphere, the planet has to have [...]

What is Time? – Time and space in Physics

By |2018-05-31T11:49:26+00:00August 19th, 2017|Physics, When|

Time and space: a sundial from Ukraine (ca. 1300 BC) - one of the two oldest sundials in the world Are time and space the same thing? Nobody knows what time is, or how it works. Time seems to be closely related to space, and it's possible that space and time are different ways [...]

Venus – Planets – Astronomy – Space science

By |2018-05-31T11:49:31+00:00August 19th, 2017|Physics|

This is what the planet Venus looks like from space. Venus is the second planet away from our Sun - Mercury is closer to the Sun, and then the Earth is a little farther from the Sun. Like the Earth, Venus probably formed about four and a half billion years ago, out of space dust in the same nebula. Venus is [...]

Uranus – Planets – Astronomy – Space science

By |2018-05-31T11:49:18+00:00August 19th, 2017|Physics|

Uranus, the second to last planet out from the Sun Uranus is between Saturn and Neptune, so it's the next to the last planet away from our Sun. It takes Uranus 84 years to go around the Sun because it is so far away. Like the other planets going around our Sun, Uranus (YER-ann-uss) formed about 4.5 billion years [...]

Supernova – Space – Astronomy

By |2018-05-31T11:49:31+00:00August 19th, 2017|Physics|

Supernova from space (thanks to NASA and the Hubble Telescope) What is a supernova? Supernovas are exploding stars. Red giant stars explode when they have used up their hydrogen and helium fuel, and converted most of their atoms to iron atoms. A red giant star explodes Red giant stars have a lot of gravity pulling them inward. Normally they don't collapse inward because the nuclear [...]

What’s the sun made of? – Astronomy – Science

By |2018-04-24T14:46:25+00:00August 19th, 2017|Physics|

The sun from space The Sun is a star, just like billions of other stars in the universe. Our Sun probably formed a little more than four and a half billion years ago, just a little bit before the planets formed around it. It's not one of the older stars in the Universe. Probably some of [...]

What are stars made of? Astronomy, physics

By |2018-05-31T11:49:32+00:00August 19th, 2017|Physics|

What are stars made of? This is just one of the stars: the sun from space The first stars The earliest stars probably formed only a few hundred thousand years after the Big Bang that started the universe - maybe about 13.5 billion years ago. Stars are the oldest big objects in the Universe. (More [...]

Saturn – Planets – Astronomy

By |2018-05-31T11:49:18+00:00August 19th, 2017|Physics|

Saturn, as seen from space After Jupiter, Saturn is the next farthest planet out from our Sun. In some ways, Saturn is a lot like Jupiter - it's very cold, and it's mostly made of an ocean of hydrogen molecules, with some helium and a little bit of other things. Like Jupiter and the other planets around our Sun, Saturn [...]

What are planets? Astronomy – Space science

By |2018-09-10T17:46:23+00:00August 19th, 2017|Physics|

What are planets? The planet Venus from space Before there were planets For several hundred million years after the Big Bang, there were no planets, only stars. Planets couldn't form until the first stars ran out of fuel and exploded into supernovas, about 14 billion years ago. The supernovas spewed out thousands of tons of carbon, oxygen, iron and other elements into space. Planets [...]

Neptune – Planets – Astronomy – Physics

By |2018-05-31T11:49:18+00:00August 19th, 2017|Physics|

Neptune from space Neptune is the farthest planet from our Sun. Neptune is the only planet that is so far away that you can't see it without a telescope. Neptune (NEPP-toon) is an icy planet, about the same size as Uranus. Neptune's probably a lot like Uranus in other ways, too. Neptune has a rocky core [...]