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Space News - Latest Space and Astronomy News | Space
网页3 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
Milky Way galaxy: Facts about our cosmic neighborhood | Space
网页2023年4月18日 · The Milky Way is a barred spiral galaxy around 13.6 billion years old with large pivoting arms stretching out across the cosmos. Milky Way quick facts: – Galaxy type: Barred spiral – Age: 13.6 ...
Earth's magnetic field: Explained | Space
网页2022年7月6日 · Additional resources. Earth's magnetic field — also known as the geomagnetic field — is generated in our planet's interior and extends out into space, creating a region known as the ...
How big is the universe? | Space
网页2022年1月28日 · Like a ship in the empty ocean, astronomers on Earth can turn their telescopes to peer 13.8 billion light-years in every direction, which puts Earth inside of an observable sphere with a radius of ...
What is the Big Bang Theory? | Space
网页2023年7月26日 · Hubble images show the far-distant galaxy GN-z11 as it appeared shortly after the Big Bang. (Image credit: NASA) This all happened within just the first second after the universe began, when the ...
10 things we learned about UFOs and aliens in 2022 | Space
网页2022年12月26日 · Despite some novel research ideas and a renewed commitment to the investigation of UFOs, however, 2022 can be characterized by steps forward and frustrating setbacks. 1. UFO 'turning point'. An ...
Perseid meteor shower 2024: when, where and how to see it
网页2024年8月12日 · Perseid meteor shower: Quick facts. — When: July 14 to August 24. — Peak: Aug. 11-12. — Comet of origin: 109P/Swift-Tuttle. — Zenithal Hourly Rate (ZHR): 100. (The number of meteors a ...
Kepler's Third Law: The movement of solar system planets
网页2021年12月20日 · Half of the major axis is termed a semi-major axis. The equation for Kepler’s Third Law is P² = a³, so the period of a planet’s orbit (P) squared is equal to the size semi-major axis of the ...
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 ...