planets

/Tag: planets
4 09, 2017

Ptolemy – Roman astronomy – history of science

By |2018-04-11T09:22:19-07:00September 4th, 2017|Romans, Science|0 Comments

A copy of Ptolemy's map of the world Ptolemy was born in Egypt in about 90 AD, when the Romans were ruling Egypt. He was a Roman citizen. Probably he was the son or grandson of a Roman government slave - maybe a clerk - who was freed and got citizenship. As a boy, Ptolemy went to Greek schools in Alexandria and wrote in Greek. When [...]

19 08, 2017

What’s the atmosphere? Weather science

By |2019-02-05T05:47:27-07:00August 19th, 2017|Physics|0 Comments

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 Why is the sky blue? All our physics articles Do all planets have atmospheres? Not all planets have atmospheres. In order [...]

19 08, 2017

Uranus – Planets – Astronomy – Space science

By |2018-05-31T11:49:18-07:00August 19th, 2017|Physics|0 Comments

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 [...]

19 08, 2017

What are planets? Astronomy – Space science

By |2018-09-10T17:46:23-07:00August 19th, 2017|Physics|0 Comments

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 [...]

19 08, 2017

Neptune – Planets – Astronomy – Physics

By |2018-05-31T11:49:18-07:00August 19th, 2017|Physics|0 Comments

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 [...]

18 08, 2017

Jupiter – Planets – Astronomy

By |2018-05-31T11:49:17-07:00August 18th, 2017|Physics|0 Comments

Jupiter from space Jupiter (named after the Roman god Jupiter) is the next planet further out from our Sun after Mars. But Jupiter is much, much further away from the Sun than Mars is. If the Sun were the size of a penny, then Earth would be about six feet away from the Sun. And Mars would be about ten [...]

18 08, 2017

Space – Astronomy – Physics

By |2018-05-31T11:49:23-07:00August 18th, 2017|Physics|0 Comments

Lyrid meteor shower - Space Most of the universe is just emptiness - there is nothing there at all. It's dark. That's space. But within the space there is a small amount of stuff. Most of the small amount of stuff in the universe is loose electrons. When the universe first got started, just [...]

18 08, 2017

What is gravity? Physics

By |2019-03-01T04:44:58-07:00August 18th, 2017|Physics|0 Comments

What is gravity? The Moon orbiting Earth (taken from space) - NASA What does gravity do? Gravity attracts all objects towards each other. Gravity has been around since the very beginning of the universe, and it works the same way everywhere in the universe, on all kinds of different objects, of all different sizes [...]

18 08, 2017

Observing the planet Mars – Astronomy

By |2018-05-31T11:49:17-07:00August 18th, 2017|Physics|0 Comments

Seeing the planet Mars You can see Mars for yourself in the sky at night, without a telescope or binoculars. Look for a bright, reddish star. It works better to look pretty late at night, usually. I know it doesn't really look that red in the picture, but it does look reddish when [...]

17 08, 2017

Acceleration – Physics definitions

By |2018-05-31T11:49:28-07:00August 17th, 2017|Physics|2 Comments

Pedaling will make her accelerate. So will going downhill. Acceleration is a way to measure how fast something is speeding up. Suppose you are riding your bike. You start out going very slowly, hardly pedaling at all. Now you begin to pedal as hard as you can, to speed up - you are [...]