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Eclipse of the sun – Astronomy

By |2018-05-31T11:49:27-07:00August 18th, 2017|Physics|

Eclipse of the sun, showing the corona An eclipse of the sun happens whenever the moon gets between the Earth and the sun, so that the moon blocks your view of the sun. Depending on where you are standing on the Earth, you might see the sun completely blocked (as in these pictures) or only partly blocked, or [...]

Eclipse of the Moon – Space science

By |2018-05-31T11:49:25-07:00August 18th, 2017|Physics|

An eclipse of the moon. You can see the curved shadow of the Earth. An eclipse of the moon happens when the Earth gets between the sun and the moon, so the light from the sun can't get to the moon to be reflected towards the Earth. In other words, the shadow of the Earth covers the whole moon. Eclipse [...]

Earthquakes and algae – the planet Earth

By |2018-05-31T11:49:27-07:00August 18th, 2017|Physics|

Molten lava Most of the molecules that smashed together to make the Earth were iron. The smashing together released a lot of heat, so the whole center of the Earth is made of hot melted iron. Because iron is heavier than most other metals, it sank to the center of the Earth. Lighter molecules like silicon and [...]

How old is the Earth? – Astronomy

By |2018-05-31T11:49:20-07:00August 18th, 2017|Physics|

Earth from space Like Mercury and Venus and the other planets that go around the Sun, the Earth probably formed a little more than four and a half billion years ago. (That's about 4,600,000,000 years ago.) Like the other planets, Earth is made of molecules that were floating around in space. They made a nebula cloud of dust that was the leftovers when our [...]

Eclipse of the moon project – Astronomy

By |2018-05-31T11:49:16-07:00August 17th, 2017|Physics|

Looking at an eclipse of the moon The best way to learn about eclipses of the moon is to go outside and look at one. Plus, it's a good excuse to stay up late at night! Mr. Eclipse is a website that will tell you when the next eclipse of the moon is where you live. Eclipses [...]

Earth, Sun, Moon dance – Astronomy project

By |2019-05-01T05:21:41-07:00August 17th, 2017|Physics|

An eclipse of the moon. You can see the curved shadow of the Earth. Watch an eclipse as an astronomy project! Dance the Earth and the Sun... To get a better idea of how the Earth moves around the Sun, work in groups of three people. One person is the Sun and stands in the middle, [...]

What is centrifugal force? Physics definitions

By |2019-03-11T05:58:01-07:00August 16th, 2017|Islam, Physics|

Kids playing tetherball using centrifugal force Who first explained centrifugal force? When something is going straight, it always keeps going straight unless something else stops it or turns it. (The Iranian scientist Ibn Sina figured this out about 1000 AD). Who was Ibn Sina? Medieval Islamic science All our physics articles An example of centrifugal [...]

Science in Early Modern Europe

By |2018-04-13T01:12:09-07:00August 7th, 2017|Modern Europe, Science|

Early modern science: Tycho Brahe (He looks funny because his nose got cut off in a duel and he wore a false one made of brass.) New observatories in Europe Europe's colonialism and slave trading brought a lot of money to Europe. By 1600 AD the fashion for building new observatories that had swept from China west [...]