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  1. Jun 26, 2024 · See the circle of galaxy clusters and voids that surround us in this map of the nearby cosmos, extending 200 million light years in each direction

  2. Jun 25, 2024 · Earth satellite, artificial object launched into a temporary or permanent orbit around Earth. Spacecraft of this type may be either crewed or uncrewed, the latter being the most common. The idea of an artificial satellite in orbital flight was first suggested by Sir Isaac Newton in his book Philosophiae Naturalis Principia Mathematica (1687).

    • The Editors of Encyclopaedia Britannica
  3. Jun 13, 2024 · A satellite is anything that orbits a planet or a star. Earth is a satellite orbiting the Sun. The Moon is a satellite orbiting Earth. When you launch a spacecraft into orbit around Earth, that’s a satellite, too. This kind of satellite can help us learn about Earth and the universe.

  4. Jun 13, 2024 · Not at all, actually! We have a lot we can learn about our home planet. Right now, there are many satellites orbiting Earth taking pictures and measurements. This is how we can learn more about weather, oceans, soil, climate change, and many other important topics.

  5. 5 days ago · With an equatorial radius of 6,378 km (3,963 miles), Earth is the largest of the four inner, terrestrial (rocky) planets, but it is considerably smaller than the gas giants of the outer solar system. Earth has a single natural satellite, the Moon, which orbits the planet

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  7. Jun 13, 2024 · All About Earth. The planet with living things . explore; Building a 3-D Map of Earth from Space! And in only 10 days! explore; Gallery of NASA Earth Images. View large images or print them. explore; What Causes the Seasons? The answer may surprise you. explore; What Is a Satellite?

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