April 12, 1961: Russian astronaut Yuri Gagarin becomes the first human to enter space and orbit the Earth. ……

Earth rotates.  TUCHONGHaving a much shorter dayHaving a much shorter day史前时期每天只有19个小时史前时期每天只有19个小...) of Earth. The closer it gets, the faster Earth rotates. Over a billion years ago, the moon was much closer ……

the ground than when it is right overhead.By the time moonlight gets to Earth, most of the shorter-length... (灰尘) and pollution in the air.Usually, when the moon becomes orange, it's close to Earth. When ……

警惕！地球在"发烧"，需要紧急降温！APRIL 22 is World Earth Day. It's a day for everyone to care about the earth. This year'sfocus(焦点) is weather change.The earth is getting warmer. Recently, American scientists said ……

to Earth in the Russian Soyuz MS-25 space capsule (太空舱). He and another Russian astronaut Oleg Kononenko... to Earth in the Russian Soyuz MS-25 space capsule (太空舱). He and another Russian astronaut Oleg ……

Anyone who’s ever played or watched tug-of-war (拔河) knows that the losing side gets pulled toward..., Japanese astronaut Koichi Wakata and Canadian astronaut Robert Thirsk played tug-of-war in space ……

Anyone who’s ever played or watched tug-of-war (拔河) knows that the losing side gets pulled toward..., Japanese astronaut Koichi Wakata and Canadian astronaut Robert Thirsk played tug-of-war in space ……

June 16, 2012: China successfully launched its Shenzhou 9 spacecraft, carrying three astronauts – including the first female Chinese astronaut, Liu Yang. The spacecraft returned to Earth on June 29. ……

VCG  Safe and sound: Russian astronaut Nikolai Chub sat in a chair upon returning to Earth in the Russian Soyuz MS-25 space capsule(太空舱)on Sept 23. He and another Russian astronaut, Oleg ……

wavelengths.Earth’s atmosphere (大气层) is full of tiny air molecules (分子). When light hits them, it gets... a different wavelength (波长). Blue has one of the shortest wavelengths.Earth’s atmosphere (大气层) is full ……

Christina Koch returns to Earth. AFPChristina Koch returns to Earth. AFP女宇航员打破纪录！女宇航员打破纪录！Touch down! NASA astronaut Christina Koch returned to Earth from the International Space Station (ISS) on Feb ……

Christina Koch returns to Earth. AFPChristina Koch returns to Earth. AFP女宇航员打破纪录！女宇航员打破纪录！Touch down! NASA astronaut Christina Koch returned to Earth from the International Space Station (ISS) on Feb ……

VCG  破纪录！他们在国际空间站待了一年多破纪录！他们在国际空间站待了一年多Russian astronaut (宇航员) Nikolai Chub sat in a chair after coming back to Earth in the Russian Soyuz MS-25 space capsule (太空舱). He and another Russian ……

AFP  Back to Earth: NASA astronaut Suni Williams was helped out of the SpaceX Dragon... mission was launched on March 14 to bring the pair home.Back to Earth: NASA astronaut Suni Williams ……

宇航员健康面临多重风险。WHEN US astronaut Neil Armstrong became the first man to ever set foot on the moon, he was treated as a hero. However, when he got back to Earth, he wasn’t allowed to return home to his ……