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| Darkness surrounds illuminated peaks between Shackleton crater (rim crest at right) and de Gerlache crater (out of scene left). As lunar days and seaons progress, darkness creeps along this elevated ridge near the south pole. Image width 15 kilometers, NAC M1195011983LR [NASA/GSFC/Arizona State University]. |
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| Scientists have discovered these wrinkle ridges in a region of the Moon called Mare Frigoris. These ridges add to evidence that the Moon has an actively changing surface. This image was taken by NASA's Lunar Reconnaissance Orbiter (LRO). NASA/GSFC |
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The Taurus-Littrow valley is the location of the Apollo 17 landing site (asterisk). Cutting across the valley, just above the landing site, is the Lee-Lincoln fault scarp. Movement on the fault was the likely source of numerous moonquakes that triggered events in the valley. 1) Large landslides on of slopes of South Massif draped relatively bright rocks and dust (regolith) on and over the Lee-Lincoln scarp. 2) Boulders rolled down the slopes of North Massif leaving tracks or narrow troughs in the regolith on the slopes of North Massif. 3) Landslides on southeastern slopes of the Sculptured Hills.
Credits: NASA/GSFC/Arizona State University/Smithsonian
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| Image captured by Chang'E 4 showed the landscape near the landing site. (Image by NAOC/CNSA) |
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| Eta Aquariid Radiant Credit: American Meteor Society https://www.amsmeteors.org |
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Hubble's Wide View of the Evolving Universe
This Hubble Space Telescope image represents the largest, most comprehensive "history book" of galaxies in the universe.
The image, a combination of nearly 7,500 separate Hubble exposures, represents 16 years' worth of observations.
The ambitious endeavor, called the Hubble Legacy Field, includes several Hubble deep-field surveys, including the eXtreme Deep Field (XDF), the deepest view of the universe. The wavelength range stretches from ultraviolet to near-infrared light, capturing all the features of galaxy assembly over time.
The image mosaic presents a wide portrait of the distant universe and contains roughly 265,000 galaxies. They stretch back through 13.3 billion years of time to just 500 million years after the universe's birth in the big bang. The tiny, faint, most distant galaxies in the image are similar to the seedling villages from which today's great galaxy star-cities grew. The faintest and farthest galaxies are just one ten-billionth the brightness of what the human eye can see.
The wider view contains about 30 times as many galaxies as in the Hubble Ultra Deep Field, taken in 2004. The new portrait, a mosaic of multiple snapshots, covers almost the width of the full Moon. Lying in this region is the XDF, which penetrated deeper into space than this legacy field view. However, the XDF field covers less than one-tenth of the full Moon's diameter.
Credits
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| 4/23/19 Costa Rica Fall Individual Meteorite Credit: Robert Ward photo via Mike Farmer |
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| Scientific simulation of a black hole consuming a neutron star.Credit: A. Tonita, L. Rezzolla, F. Pannarale |
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| Hyabusa 2 Credit: ESA |
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Comet C/2018 Y1 Iwamoto as imaged in multiple exposures of infrared light by the NEOWISE space telescope. The infrared images were taken on Feb. 25, 2019, when the comet was about 56 million miles, or 90 million kilometers, from Earth. C/2018 Y1 Iwamoto is a long-period comet originally from the Oort Cloud and coming in near the Sun for the first time in over 1,000 years.
Appearing as a string of red dots, this comet can be seen in a series of exposures captured by the spacecraft. Infrared light detected by the 3.4-micron channel is mapped to blue and green, while light from the 4.6-micron channel is mapped to red. In this image, stars show up as blue because they are hotter, whereas the cooler dust around the comet - with a temperature near the freezing point of water - glows red.
Credit: NASA JPL-Caltech
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| Dr. Amy Mainzer, NASA JPL with Sky Guy Greg |
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CHANG'E-4 LRO TIMELAPSEThis time series of the Chang'e-4 landing site from NASA's Lunar Reconnaissance Orbiter shows Yutu-2 roving away its lander.NASA/GSFC/Arizona State UniversitySky Guy in VA |
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| An illustration of Mercury’s interior based on new research that shows the planet has a solid inner core. Credit: Antonio Genova.
Pretty amazing......
Sky Guy in VA
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A selfie image was taken of the spacecraft 22km above the Moon and the landing attempt proceeded. Apparently the main engine failed during the final descent at 150 meters from the surface. |
| Scientists have obtained the first image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. The image shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun. Credit: Event Horizon Telescope Collaboration FROM NASA/JPL |
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Credits: NASA, ESA and the Hubble Heritage Team (STScI/AURA); Acknowledgment: P. Cote (Herzberg Institute of Astrophysics) and E. Baltz (Stanford University)
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| A simulated image by the University of Arizona shows the turbulent plasma in the extreme environment around a supermassive black hole. Credit: University of Arizona. |
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| Sky For Washington D.C. area 4/2/19at 6:30 a.m. Sky Safari Pro |
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| DARKEN SHIP! UNKNOWN |
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| A meteor impact 66 million years ago generated a tsunami-like wave in an inland sea that killed and buried fish, mammals, insects and a dinosaur, the first victims of Earth’s last mass extinction event. The death scene from within an hour of the impact has been excavated at an unprecedented fossil site in North Dakota. (Graphics and photos courtesy of Robert DePalma) From UC Berkeley News |
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This Hubble Space Telescope image reveals the gradual self-destruction of an asteroid, whose ejected dusty material has formed two long, thin, comet-like tails. The longer tail stretches more than 500,000 miles (800,000 kilometers) and is roughly 3,000 miles (4,800 kilometers) wide. The shorter tail is about a quarter as long. The streamers will eventually disperse into space.
Credits: NASA, ESA, K. Meech and J. Kleyna (University of Hawaii), and O. Hainaut (European Southern Observatory)
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| Image credit: NASA/Goddard Space Flight Center/Mary Pat Hrybyk-Keith |
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| From EarthSky.org ALMA image of the dusty disk around the young star DM Tau. You can see 2 concentric rings, where planets may be forming. Image via ALMA. |
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This view of asteroid Bennu ejecting particles from its surface on January 19 was created by combining two images taken on board NASA’s OSIRIS-REx spacecraft. Other image processing techniques were also applied, such as cropping and adjusting the brightness and contrast of each image.
Credits: NASA/Goddard/University of Arizona/Lockheed Martin
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| In this animated sequence of photos taken by Japan's Himawari 8 weather satellite on Dec. 18, 2018, you can follow the progress of the dark dust cloud and glowing trail left by the meteoroid as it came crashing down into Earth's atmosphere at an estimated 32 km/s (72,000 mph). Japan Meteorological Agency |
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| Center of Milky Way Galaxy Taken Underway on Azamara Quest |
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| This artist's concept shows planet KELT-9b orbiting its host star, KELT-9. It is the hottest gas giant planet discovered so far. Credit NASA JPL |
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| NASA TV
This is a BIG step forward on returning astronauts to space using US built hardware launched from US soil.
I'll have much more tomorrow.
Sky Guy in VA
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| A picture taken by the camera of the Beresheet spacecraft 23,363 miles from Earth. Photograph: AFP/Getty via UK THE GUARDIAN SKY GUY IN VA |
