保护地球，探索宇宙，发现文明
2022年9月15日 Harvest Moon over Sicily Image Credit & Copyright: Dario Giannobile Explanation: For northern hemisphere dwellers, September’s Full Moon was the Harvest Moon. Reflecting warm hues at sunset it rises over the historic town of Castiglione di Sicilia in this telephoto view from September 9. Famed in festival, story, and song Harvest Moon i...
A little blue heron is seen in front of the Vehicle Assembly Building as preparations for launch continue, Friday, Sept. 2, 2022, at NASA’s Kennedy Space Center in Florida. NASA’s Artemis I flight test is the first integrated test of the agency’s deep space exploration systems: the Orion spacecraft, Space Launch System (SLS) rocket, and supporting ground sys...
2022年9月14日 Waves of the Great Lacerta Nebula Image Credit & Copyright: Jarmo Ruuth, Telescope Live; Text: Ata Sarajedini (Florida Atlantic U., Astronomy Minute podcast) Explanation: It is one of the largest nebulas on the sky — why isn’t it better known? Roughly the same angular size as the Andromeda Galaxy, the Great Lacerta Nebula can be f...
影像来源：X射线：NASA/CXC/GSFC/B. J. Williams et al.；可见光：NASA/ESA/STScI 虽然天文学家已经看到了银河系和附近星系中数十颗爆炸恒星的碎片，但通常很难确定恒星消亡的时间线。通过使用NASA望远镜研究邻近星系中壮观的超新星遗迹，一组天文学家已经找到了足够的线索来帮助时光倒流。 超新星遗迹SNR 0519-69.0（简称SNR 059）是白矮星爆炸产生的碎片。在达到临界质量后，无论是从伴星中吸取物质还是与另一颗白矮星合并，恒星都经历了热核爆炸并被摧毁。科学家们将这种被称为Ia型的超新星用于广泛的科学研究，从热核爆炸研究到测量数十亿光年的星系距离。 SNR 0519位于大麦哲伦星云中，这是一个距离地球160,000光年的小星系。这张合成图像显示了来自NASA钱德拉X射...
European Space Agency astronaut Samatha Cristoforetti captured a photo of a portion of China’s Tanggula Mountains near Hala Lake as the International Space Station orbited 260 miles above the Earth on Sept. 5, 2022. Since the station began hosting human astronauts in November 2000, crew members have produced hundreds of thousands of images of the land,...
2022年9月13日 A Long Snaking Filament on the Sun Image Credit & Copyright: Alan Friedman (Averted Imagination) Explanation: Earlier this month, the Sun exhibited one of the longer filaments on record. Visible as the bright curving streak around the image center, the snaking filament’s full extent was estimated to be over half of the Sun’s radiu...
On Sept. 12, 1962, President Kennedy spoke before a crowd of 35,000 people at Rice University in Houston. During his speech, the President recommitted the nation to the Moon landing goal he proposed to Congress in May 1961, rallying the nation to land astronauts on the Moon before the end of the decade and bring the crew safely back to Earth. We will provide...
This nighttime photograph from the International Space Station (ISS) as it orbited 261 miles above Earth looks across the Mediterranean Sea from north Africa to southern Europe. The city lights of Algiers, Algeria to Tunis, Tunisia highlight Africa’s northern coast from the bottom center toward the upper right. From far left, the lights of city-state M...
2022年9月12日 Red Sprite Lightning over the Czech Republic Image Credit & Copyright: Daniel Ščerba Explanation: What are those red filaments in the sky? They are a rarely seen form of lightning confirmed only about 35 years ago: red sprites. Research has shown that following a powerful positive cloud-to-ground lightning strike, red sprites may start as 100...
2022年9月11日 Planets of the Solar System: Tilts and Spins Video Credit: NASA, Animation: James O’Donoghue (JAXA) Explanation: How does your favorite planet spin? Does it spin rapidly around a nearly vertical axis, or horizontally, or backwards? The featured video animates NASA images of all eight planets in our Solar System to show them spinning side-by-...