查看完整版本 : 雪茄型小行星Oumuamua已近距飛離地球!

LT3648 2017-11-21 06:44 PM

雪茄型小行星Oumuamua已近距飛離地球!

[url=https://www.youtube.com/watch?v=O6PpbO7vIjU]https://www.youtube.com/watch?v=O6PpbO7vIjU[/url]

根據NASA公布,此小行星已於本月初略過地球(看片),點解咁耐才事後通知?假如此小行星當時衝向地球,大氣層能燒滅它嗎?

[url=https://www.nasa.gov/feature/solar-system-s-first-interstellar-visitor-dazzles-scientists]https://www.nasa.gov/feature/solar-system-s-first-interstellar-visitor-dazzles-scientists[/url]

"The asteroid, named ‘Oumuamua by its discoverers, is up to one-quarter mile (400 meters) long and highly-elongated—perhaps 10 times as long as it is wide."

"A few large ground-based telescopes continue to track the asteroid, though it’s rapidly fading as it recedes from our planet. Two of NASA’s space telescopes (Hubble and Spitzer) are tracking the object the week of Nov. 20. As of Nov. 20, ‘Oumuamua is travelling about 85,700 miles per hour (38.3 kilometers per second) relative to the Sun. Its location is approximately 124 million miles (200 million kilometers) from Earth -- the distance between Mars and Jupiter – though its outbound path is about 20 degrees above the plane of planets that orbit the Sun. The object passed Mars’s orbit around Nov. 1 and will pass Jupiter’s orbit in May of 2018. It will travel beyond Saturn’s orbit in January 2019; as it leaves our solar system, ‘Oumuamua will head for the constellation Pegasus."

[[i] 本帖最後由 LT3648 於 2017-11-21 08:39 PM 編輯 [/i]]
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查看完整版本: 雪茄型小行星Oumuamua已近距飛離地球!