Astronomy Magazine: Space News, Observing, Planets, Galaxies
5 天之前 · Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes ...
Speed of light: How fast light travels, explained simply and clearly
2024年1月23日 · The speed of light is 299,792,458 meters per second and that constant tells us much about cause and effect in the universe.
News | Astronomy.com
News from Astronomy Your source for the latest news on planets, stars, galaxies, cosmology, observing events, space missions, and more.
Understanding the phases of the Moon | Astronomy.com
2023年8月30日 · The Moon, Earth’s nearest celestial neighbor, has fascinated humanity for ages with its ever-changing phases. Each month, the Moon transitions through a series of distinct visual stages ...
What if the Moon disappeared tomorrow? | Astronomy.com
2019年11月25日 · The Moon holds Earth’s 23.5-degree tilt steady. Without our satellite, the planet would wobble, dramatically affecting seasons and climate.
Why the winter solstice is the longest night every year, and when it ...
2023年12月22日 · The winter solstice — the exact moment when the Sun appears farthest south in the sky — happens at 4:20 a.m. ET on Dec. 21 in 2024.
The Star of Bethlehem: Can science explain what it really was?
2023年12月24日 · Jupiter and Saturn came together in a “Great Conjunction” in 2020 that was unlike any seen in nearly 800 years. The two planets appeared so close together in Earth’s night sky on the winter ...
What will happen to the planets when the Sun becomes a red giant?
2020年9月18日 · A: Roughly 5 billion years from now, the Sun will exhaust the hydrogen fuel in its core and start burning helium, forcing its transition into a red giant star.
2024 solar eclipse: Path, times, how and where to see it
2024年4月8日 · The complete 2024 solar eclipse path and times — from 11:42 a.m. until 4:52 p.m. EDT on April 8 — including a state-by-state guide.
How Did the Big Bang Happen? | Astronomy.com
2019年7月1日 · The universe cooled rapidly as it blew outward, however, and by 10–35 second after the Big Bang, the epoch of inflation occurred, enlarging the universe by a factor of 1050 in only 10–34 second.