MAVEN的火星紫外影像

MAVEN的火星紫外影像

ByNASA中文

2023年6月27日 MAVEN’s Ultraviolet Mars Image Credit: MAVEN, Laboratory for Atmospheric and Space Physics, Univ. Colorado, NASA Explanation: These two global views of Mars were captured at ultraviolet wavelengths, beyond the spectrum visible to human eyes. Recorded by the MAVEN spacecraft’s Imaging Ultraviolet Spectrograph instrument in July 2022 (left) and January 2023, three otherwise invisible ultraviolet bands are mapped into red, green, and blue colors. That color scheme presents the Red Planet’s surface features in shades of tan and green. Haze and clouds appear white or blue, while high altitude ozone takes on a dramatic purple hue. On the left, Mars’ south polar ice cap is in brilliant white at the bottom but shrinking during the southern hemisphere’s summer season. On the right, the northern hemisphere’s…

以新的方式探索气候数据

以新的方式探索气候数据

ByNASA中文

Local students take in the sights—and data—at an Earth Information Center student engagement event, Friday, June 23, 2023, at NASA Headquarters in Washington. The Earth Information Center is a new immersive experience that combines live data sets with innovative data visualization and storytelling to show visitors how our planet is changing. The center gives a whole Earth view down to local information, from temperatures in our cities to sea level rise, greenhouse gas emissions to agricultural productivity. Visit this hybrid exhibit in person at NASA Headquarters in Washington or online. Take a virtual tour of the Earth Information Center. Image Credit: NASA/Keegan Barber 2023年6月23日星期五，在华盛顿的NASA总部，当地学生在地球信息中心的学生参与活动中观看景观和数据。地球信息中心是一种全新的沉浸式体验，它将实时数据集与创新的数据可视化和讲故事相结合，向游客展示我们的星球是如何的变化。 该中心提供了从城市温度到海平面上升、从温室气体排放到农业生产力的全地球视角和本地信息。亲自到华盛顿的NASA总部或在网上参观这个混合展览。 来一次虚拟的地球信息中心之旅吧。 图片来源：NASA/Keegan Barber

珠穆朗玛峰上空的金星带

珠穆朗玛峰上空的金星带

ByNASA中文

2023年6月26日 The Belt of Venus over Mount Everest Image Credit & Copyright: Soumyadeep Mukherjee Explanation: You’ve surely seen it, but you might not have noticed it. During a cloudless twilight, just before sunrise or after sunset, part of the atmosphere above the horizon appears slightly dark and off-color. Called the Belt of Venus, this transitional band between the dark eclipsed sky and the bright day sky can be seen most prominently in the direction opposite the Sun. Straight above, blue sky is normal sunlight reflecting off the atmosphere, while near the horizon the clear sky can appear more orange or red. In the Belt of Venus, the atmosphere reflects more light from the setting (or rising) Sun and so appears more red. Featured here, the…

木星的闪电

木星的闪电

ByNASA中文

2023年6月25日 Lightning on Jupiter Image Credit: NASA/JPL-Caltech/SwRI/MSSS; Processing & License: Kevin M. Gill Explanation: Does lightning occur only on Earth? No. Spacecraft in our Solar System have detected lightning on other planets, including Mars, Jupiter and Saturn, and lightning is likely on Venus, Uranus, and Neptune. Lightning is a sudden rush of electrically charged particles from one location to another. On Earth, drafts of colliding ice and water droplets usually create lightning-generating charge separation, but what happens on Jupiter? Images and data from NASA’s Jupiter-orbiting Juno spacecraft bolster previous speculation that Jovian lightning is also created in clouds containing water and ice. In the featured Juno photograph, an optical flash was captured in a large cloud vortex near Jupiter’s north pole. During the next few…

机智号的立体影像

机智号的立体影像

ByNASA中文

2023年6月24日 3D Ingenuity Image Credit: NASA, JPL-Caltech, MSSS, ASU Explanation: The multicolor, stereo imaging Mastcam-Z on the Perseverance rover zoomed in to capture this 3D close-up (get out your red/blue glasses) of the Mars Ingenuity helicopter on mission sol 45. That’s Earth-date 2021 April 5. Casting a shadow on the Martian surface, Ingenuity is standing alone on its four landing legs next to the rover’s wheel tracks. The experimental helicopter’s solar panel, charging batteries that keep it warm through the cold Martian nights and power its flight, sits just above Ingenuity’s two 1.2 meter (4 foot) long counter-rotating blades. Thirteen sols later, on April 19, Ingenuity became the first aircraft to perform powered, controlled flight on another planet. It has since gone on to complete…

哈勃望远镜瞥见一个闪烁的星团

哈勃望远镜瞥见一个闪烁的星团

ByNASA中文

The teeming stars of the globular cluster NGC 6544 glisten in this image from the NASA/ESA Hubble Space Telescope. This cluster of tightly bound stars lies more than 8,000 light-years away from Earth and is, like all globular clusters, a densely populated region of tens of thousands of stars. This image of NGC 6544 combines data from two of Hubble’s instruments, the Advanced Camera for Surveys and Wide Field Camera 3, as well as two separate astronomical observations. The first observation was designed to find a visible counterpart to the radio pulsar discovered in NGC 6544. A pulsar is the rapidly spinning remnant of a dead star, emitting twin beams of electromagnetic radiation like a vast astronomical lighthouse. This pulsar rotates particularly quickly, and astronomers…

孔雀座的庞大星系

孔雀座的庞大星系

ByNASA中文

2023年6月23日 Giant Galaxies in Pavo Image Credit & Copyright: Mike Selby, Observatorio El Sauce Explanation: Over 500,000 light years across, NGC 6872 (top right) is a truly enormous barred spiral galaxy, at least 5 times the size of our own very large Milky Way. The appearance of this giant galaxy’s distorted and stretched out spiral arms suggests the magnificent wings of a giant bird. Of course its popular moniker is the Condor galaxy. It lies about 200 million light-years distant toward the southern constellation Pavo, the Peacock. Lined with star-forming regions, the distorted spiral arms are due to NGC 6872’s gravitational interaction with the nearby smaller galaxy IC 4970, seen just above the giant galaxy’s core. The Pavo galaxy group’s dominant giant elliptical galaxy, NGC…