阿尔忒弥斯1号: 任务的第13天

阿尔忒弥斯1号: 任务的第13天

ByNASA中文

2022年12月1日 Artemis 1: Flight Day 13 Image Credit: NASA, Artemis 1 Explanation: On flight day 13 (November 28) of the Artemis 1 mission the Orion spacecraft reached its maximum distance from Earth. In fact, over 430,000 kilometers from Earth its distant retrograde orbit also put Orion nearly 70,000 kilometers from the Moon. In the same field of view in this video frame from flight day 13, planet and large natural satellite even appear about the same apparent size from the uncrewed spacecraft’s perspective. Today (December 1) should see Orion depart its distant retrograde orbit. En route to planet Earth it will head toward a second powered fly by of the Moon. Splashdown on the home world is expected on December 11. Tomorrow’s picture: pixels in…

来自猎户座的地落

来自猎户座的地落

ByNASA中文

2022年11月23日 Earthset from Orion Image Credit: NASA, Artemis 1 Explanation: Eight billion people are about to disappear in this snapshot from space. Taken on November 21, the sixth day of the Artemis 1 mission, their home world is setting behind the Moon’s bright edge as viewed by an external camera on the outbound Orion spacecraft. The Orion was headed for a powered flyby that took it to within 130 kilometers of the lunar surface. Velocity gained in the flyby maneuver will be used to reach a distant retrograde orbit around the Moon. That orbit is considered distant because it’s another 92,000 kilometers beyond the Moon, and retrograde because the spacecraft will orbit in the opposite direction of the Moon’s orbit around planet Earth. Orion will…

猎户座的光学导航相机拍摄到了地球的照片

猎户座的光学导航相机拍摄到了地球的照片

ByNASA中文

NASA’s uncrewed Orion spacecraft snapped this black and white photo of Earth on Nov. 17, 2022, the second day of the 25.5-day Artemis I mission. The optical navigation camera is used to capture imagery of the Earth and the Moon at different phases and distances, which help establish its effectiveness as a way of determining its position in space for future missions under differing lighting conditions. Follow Orion’s journey by visiting the Artemis I blog. Image Credit: NASA 11月20日，为期25.5天的阿尔忒弥斯一号任务的第二天，NASA无人驾驶的猎户座飞船拍摄了这张地球黑白照片。光学导航相机用于拍摄地球和月球在不同阶段和距离的图像，这有助于确定其在不同照明条件下未来飞行任务中确定其空间位置的有效性。 通过访问阿尔忒弥斯一号博客了解猎户座的旅程。 影像来源：NASA

猎户座的地球图像

猎户座的地球图像

ByNASA中文

2022年11月17日 Planet Earth from Orion Image Credit: NASA, Artemis 1 Explanation: A Space Launch System rocket left planet Earth on Wednesday, November 16 at 1:47am EST carrying the Orion spacecraft on the Artemis 1 mission, the first integrated test of NASA’s deep space exploration systems. Over an hour after liftoff from Kennedy Space Center’s historic Launch Complex 39B, one of Orion’s external video cameras captured this view of its new perspective from space. In the foreground are Orion’s Orbital Maneuvering System engine and auxillary engines, at the bottom of the European Service Module. Beyond one of the module’s 7-meter long extended solar array wings lies the spacecraft’s beautiful home world. The Artemis 1 mission will last almost four weeks, testing capabilities to enable human exploration…

鬼气行星的夜晚

鬼气行星的夜晚

ByNASA中文

2022年10月30日 Night on a Spooky Planet Image Credit & Copyright: Stéphane Vetter (Nuits sacrées) Explanation: What spooky planet is this? Planet Earth of course, on a dark and stormy night in 2013 at Hverir, a geothermally active area along the volcanic landscape in northeastern Iceland. Triggered by solar activity, geomagnetic storms produced the auroral display in the starry night sky. The ghostly towers of steam and gas are venting from fumaroles and danced against the eerie greenish light. For now, auroral apparitions are increasing as our Sun approaches a maximum in its 11 year solar activity cycle. And pretty soon, ghostly shapes may dance in your neighborhood too. Tomorrow’s picture: big bat 鬼气行星的夜晚 图像提供与版权: Stéphane Vetter（Nuits sacrées） 说明: 这是那颗在闹鬼的行星啊？地球是也；地点在冰岛东北火山地带里的Hverir地热活跃区，时间则是2013年某个漆黑的风暴夜。当时，地球磁暴引发星空中的极光活动，而从喷气孔冒出、形似幽灵的柱状水汽和气体，则在魅异的泛绿极光下方舞动。目前随着太阳往活动极大期靠近，极光出现的机会也随着增加。所以幽灵般的光影，或许很快就会在你的四周飞舞。 明日的图片: big bat

露西发现了地球和月球

露西发现了地球和月球

ByNASA中文

On Oct. 13, 2022, NASA’s Lucy spacecraft captured this image of the Earth and the Moon from 890,000 miles (1.4 million km) away. The image was taken as part of an instrument calibration sequence as the spacecraft approached Earth for its first of three Earth gravity assists. These Earth flybys provide Lucy with the speed required to reach the Trojan asteroids — small bodies that orbit the Sun at the same distance as Jupiter. On its 12-year journey, Lucy will fly by a record-breaking number of asteroids and survey their diversity, looking for clues to better understand the formation of the solar system. The image was taken with Lucy’s Terminal Tracking Camera (T2CAM) system, a pair of identical cameras that are responsible for tracking the…

迪朗达克州立公园空中赏叶

迪朗达克州立公园空中赏叶

ByNASA中文

Our Operational Land Imager-2 on Landsat 9 acquired this vibrant image of deciduous trees and conifers in the Adirondack Mountains in northeast New York on Oct. 8, 2022. Adirondack Park, the largest state park in the contiguous United States, puts on a reliable show of seasonal color. Deciduous trees with especially vivid hues include sugar and red maples, as well as quaking and bigtooth aspens. Eastern larches also put on a showy display, but on this conifer, it is the needles, not leaves, that turn brilliant golden yellow in autumn. Fall color reaches its peak when air temperatures drop and shortened daylight triggers plants to slow and stop the production of chlorophyll—the molecule that plants use to synthesize food. When the green chlorophyll pigment fades,…

地球所有的水

地球所有的水

ByNASA中文

2022年9月26日 All the Water on Planet Earth Illustration Credit: Jack Cook, Adam Nieman, Woods Hole Oceanographic Institution; Data source: Igor Shiklomanov Explanation: How much of planet Earth is made of water? Very little, actually. Although oceans of water cover about 70 percent of Earth’s surface, these oceans are shallow compared to the Earth’s radius. The featured illustration shows what would happen if all of the water on or near the surface of the Earth were bunched up into a ball. The radius of this ball would be only about 700 kilometers, less than half the radius of the Earth’s Moon, but slightly larger than Saturn’s moon Rhea which, like many moons in our outer Solar System, is mostly water ice. The next smallest ball depicts…