Roter Kamm impact crater : 無料・フリー素材/写真
Roter Kamm impact crater / europeanspaceagency
| ライセンス | クリエイティブ・コモンズ 表示-継承 2.1 |
|---|---|
| 説明 | On Asteroid Day, the Copernicus Sentinel-2 mission takes us over the Roter Kamm impact crater in Namibia. The circular shape of the crater rim can be seen in the left of the image, just below the centre.Zoom in to view this image at its full 10 m resolution.The Roter Kamm impact crater is located in the Tsau ǁKhaeb National Park, also known as the Sperrgebiet, a diamond mining area in the Namib Desert, in southwest Namibia. According to geologists, the crater was formed by a meteorite around the size of a large vehicle that collided with Earth approximately 5 million years ago.The crater has a diameter of 2.5 km and is around 130 m deep. It is clearly visible in the midst of the rust-red dunes, with its rims rising some 40 to 90 m above the surrounding plain. Its floors are covered by sand deposits at least 100 m thick.Meteorites and asteroids have influenced Earth’s development, as seen by the millions of impact craters scarring our world. Each year on 30 June, the worldwide UN-sanctioned Asteroid Day takes place to raise awareness about asteroids and what can be done to protect Earth from possible impact. The day falls on the anniversary of the Tunguska event that took place on 30 June 1908 in Siberia, the most harmful known asteroid related event in recent history.Over the last two decades, ESA has been performing detection and analysis of asteroids whose orbits bring them close to Earth, known as near-Earth objects (NEOs). There are an estimated 40 000 000 NEOs out there larger than 10 m – the threshold above which damage on the ground could happen.ESA is also developing the Hera mission, which will be the first to test the effectiveness of asteroid deflection, as it flies to the Didymos binary system that will soon be impacted by NASA’s DART. If an asteroid is detected that is on collision course with Earth, these missions mean we will be more prepared to act.Follow the latest asteroid news and updates today at 12:00 CEST on Asteroid Day TV. Hosted by award-winning science and space journalist Richard Hollingham, the programme will include features and discussions with leading asteroid experts.ESA’s Asteroid Day programme is available in six languages, all available to replayCredits: contains modified Copernicus Sentinel data (2020), processed by ESA, CC BY-SA 3.0 IGO |
| 撮影日 | 2020-06-30 10:35:27 |
| 撮影者 | europeanspaceagency |
| タグ | |
| 撮影地 | Witputs, Karas, Namibia 地図 |