Space News - Latest Space and Astronomy News | Space
网页2 天之前 · Space.com is your source for the latest astronomy news and space discoveries, live coverage of space flights and the science of space travel. | Space
Space.com: NASA, Space Exploration and Astronomy News
网页3 天之前 · Get the latest space exploration, innovation and astronomy news. Space.com celebrates humanity's ongoing expansion across the final frontier.
Heliocentrism: Definition, origin and model | Space
网页2022年4月8日 · Bibliography. Following the theory of heliocentrism, today we know that Earth, and the other planets of the solar system, are all in orbit around the sun. However, it was once believed that Earth ...
Earth's magnetic field: Explained | Space
网页2022年7月6日 · Earth has two sets of poles, geographic pole and magnetic poles. Earth's magnetic field can be visualized if you imagine a large bar magnet inside our planet, roughly aligned with Earth's axis.
What is gravity? | Space
网页2023年7月30日 · Gravity is one of the universe's fundamental forces and dominates every moment of our conscious experience. It keeps us close to the ground, drags baseballs and basketballs out of the air and ...
Why is the sky blue? - Space.com
网页2022年8月25日 · The answer lies in the physics of when sunlight passes through the atmosphere. The light rays are scattered in all directions as they hit the air molecules, and light at the blue end of the ...
The summer solstice: What is it and when does it occur? - Space.com
网页2022年9月26日 · The summer solstice for the Northern Hemisphere occurs on June 20, 2024, at 4:51 p.m. EDT (2051 GMT), and the summer solstice for the Southern Hemisphere occurs on Dec. 21, 2024, at 5:29 a.m. EST ...
The four fundamental forces of nature - Space.com
网页2021年12月23日 · From playing basketball, to launching a rocket into space, to sticking a magnet on your refrigerator - all the forces that all of us experience every day can be whittled down to a critical quartet ...
Stephen Hawking biography: Theories, books & quotes | Space
网页2021年12月1日 · British cosmologist Stephen William Hawking was born in Oxford, England on Jan. 8, 1942 — 300 years to the day after the death of the astronomer Galileo Galilei. He attended University College ...
Blue Moon: what is it and when is the next one? - Space.com
网页2024年8月20日 · The moon phases actually take 29.5 days to complete which means it takes just 354 days to complete 12 lunar cycles. So every 2.5 years or so a 13th full moon is observed within a calendar year.
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