Space
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In late Jan. 2018, NASA’s Global-scale Observations of the Limb and Disk (GOLD) instrument was launched into space aboard a commercial satellite.
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Elongated Coronal Hole
Over the past week, the single, largest feature on the sun was a long coronal hole that stretched out across more than half the diameter of the sun (Mar. 13-15, 2018).
Coronal holes appear dark in certain wavelengths of extreme ultraviolet light like the one you see here. They are areas of open magnetic fields from which solar wind rushes out into space. This area likely generated the beautiful aurora that were reportedly observed on March 14th in regions near Earth's poles.
With the Earth set in the image to show scale, you get a good sense of just how extensive this hole is.2 -
This image from the NASA/ESA Hubble Space Telescope shows the galaxy cluster PLCK G004.5-19.5.
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Bullet_with_Butterfly_Wings wrote: »
You might enjoy this:
Images from the Hubble Telescope:
https://www.nasa.gov/mission_pages/hubble/multimedia/index.html
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Researchers Catch Supermassive Black Hole Burping - Twice
Astronomers have caught a supermassive black hole in a distant galaxy snacking on gas and then “burping” – not once, but twice.1 -
Bullet_with_Butterfly_Wings wrote: »
You might enjoy this:
Images from the Hubble Telescope:
https://www.nasa.gov/mission_pages/hubble/multimedia/index.html
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Hubble’s Exquisite View of a Stellar Nursery
An underlying population of infant stars embedded in the nebula NGC 346 are still forming from gravitationally collapsing gas clouds.2 -
Investigating Mars: Arabia Terra Dunes
This is a false color image of the dune field in the Arabia Terra crater. In this combination of bands, sand appears as a blue to dark blue color. In this image, the smaller areas of sand are easily visible and indicate the large amount of available material for creating dunes.
Located in eastern Arabia is an unnamed crater, 120 kilometers (75 miles) across. The floor of this crater contains a large exposure of rocky material, a field of dark sand dunes, and numerous patches of what is probably fine-grain sand. The shape of the dunes indicate that prevailing winds have come from different directions over the years. The THEMIS VIS camera contains 5 filters.
The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations of the surface not easily identified in a single band image.
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The Sun with a UV filter.
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March 5, 2018 - Russia's Progress 68 resupply ship is pictured docked to the Pirs docking compartment as the International Space Station orbited over the Atlantic Ocean south of the island of Bermuda.1 -
Hubble's Cool Galaxy with a Hot Corona
Galaxy NGC 6753, imaged here by the NASA/ESA Hubble Space Telescope, is a whirl of color2 -
March 29, 2018 - A portion of a Russian solar array peeks out on the side of this photograph of Earth as the International Space Station orbited off the northwest coast of Spain.
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Galaxy NGC 3079
A lumpy bubble of hot gas rises from a cauldron of glowing matter in a distant galaxy, as seen by NASA Hubble Space Telescope.2 -
Wavelength Comparisons
NASA's Solar Dynamics Observatory ran together three sequences of the sun taken in three different extreme ultraviolet wavelengths to better illustrate how different features that appear in one sequence are difficult if not impossible to see in the others (Mar. 20-21, 2018).
In the red sequence (304 Angstroms), we can see very small spicules and some small prominences at the sun's edge, which are not easy to see in the other two sequences. In the second clip (193 Angstroms), we can readily observe the large and dark coronal hole, though it is difficult to make out in the others. In the third clip (171 wavelengths), we can see strands of plasma waving above the surface, especially above the one small, but bright, active region near the right edge.
And these are just three of the 10 extreme ultraviolet wavelengths in which SDO images the sun every 12 seconds every day.1 -
Wispy Remains of Supernova Explosion Hide Possible 'Survivor'
This image, taken with NASA's Hubble Space Telescope, shows the supernova remnant SNR 0509-68.7, also known as N103B. It is located 160,000 light-years from Earth in a neighboring galaxy called the Large Magellanic Cloud. N103B resulted from a Type Ia supernova, whose cause remains a mystery.2 -
Going for Atmospheric GOLD
In late Jan. 2018, NASA’s Global-scale Observations of the Limb and Disk (GOLD) instrument was launched into space aboard a commercial satellite.1 -
Hangout in Space
NASA astronaut Drew Feustel seemingly hangs off the International Space Station while conducting a spacewalk on March 29, 2018.1 -
Wispy Remains of Supernova Explosion Hide Possible 'Survivor'
This image, taken with NASA's Hubble Space Telescope, shows the supernova remnant SNR 0509-68.7, also known as N103B. It is located 160,000 light-years from Earth in a neighboring galaxy called the Large Magellanic Cloud. N103B resulted from a Type Ia supernova, whose cause remains a mystery. 2 -
Hubble Captures View of Mystic Mountain
NASA Hubble Space Telescope captures the chaotic activity atop a three-light-year-tall pillar of gas and dust that is being eaten away by the brilliant light from nearby bright stars in a tempestuous stellar nursery called the Carina Nebula.3 -
Hubble Captures View of Mystic Mountain
NASA Hubble Space Telescope captures the chaotic activity atop a three-light-year-tall pillar of gas and dust that is being eaten away by the brilliant light from nearby bright stars in a tempestuous stellar nursery called the Carina Nebula.
Mind Blowing... love it2 -
The Twin Jet Nebula
The Twin Jet Nebula, or PN M2-9, is a striking example of a bipolar planetary nebula. Bipolar planetary nebulae are formed when the central object is not a single star, but a binary system, Studies have shown that the nebula’s size increases with time, and measurements of this rate of increase suggest that the stellar outburst that formed the lobes occurred just 1200 years ago.3 -
Intricate Clouds of Jupiter
See intricate cloud patterns in the northern hemisphere of Jupiter in this new view taken by NASA's Juno spacecraft. The color-enhanced image was taken on April 1, 2018 at 2:32 a.m. PST (5:32 a.m. EST), as Juno performed its twelfth close flyby of Jupiter. At the time the image was taken, the spacecraft was about 7,659 miles (12,326 kilometers) from the tops of the clouds of the planet at a northern latitude of 50.2 degrees.1 -
Orion Nebula and Bow Shock
Astronomers using NASA Hubble Space Telescope have found a bow shock around a very young star in the nearby Orion nebula, an intense star-forming region of gas and dust.2 -
The Aurora and the Sunrise
Auroras are one of the many Earthly phenomena the crew of the International Space Station observe from their perch high above the planet.2 -
Hubble Finds an Einstein Ring
These graceful arcs are a cosmic phenomenon known as an Einstein ring - created as the light from distant galaxies warps around an extremely large mass, like a galaxy cluster.4 -
Galaxy Evolution Explorer Spies Band of Stars
Globular star cluster NGC 362, in a false-color image from NASA's Galaxy Evolution Explorer. Image credit: NASA/JPL-Caltech/Univ. of Virginia The Galaxy Evolution Explorer's ultraviolet eyes have captured a globular star cluster, called NGC 362, in our own Milky Way galaxy. In this new image, the cluster appears next to stars from a more distant neighboring galaxy, known as the Small Magellanic Cloud. "This image is so interesting because it allows a study of the final stages of evolution of low-mass stars in NGC 362, as well as the history of star formation in the Small Magellanic Cloud," said Ricardo Schiavon of the University of Virginia, Charlottesville, Va. Globular clusters are densely packed bunches of old stars scattered in galaxies throughout the universe.
NGC 362, located 30,000 light-years away, can be spotted as the dense collection of mostly yellow-tinted stars surrounding a large white-yellow spot toward the top-right of this image. The white spot is actually the core of the cluster, which is made up of stars so closely packed together that the Galaxy Evolution Explorer cannot see them individually. The light blue dots surrounding the cluster core are called extreme horizontal branch stars. These stars used to be very similar to our sun and are nearing the end of their lives. They are very hot, with temperatures reaching up to about four times that of the surface of our sun (25,000 Kelvin or 45,500 degrees Fahrenheit). A star like our sun spends most of its life fusing hydrogen atoms in its core into helium. When the star runs out of hydrogen in its core, its outer envelope will expand. The star then becomes a red giant, which burns hydrogen in a shell surrounding its inner core.
Throughout its life as a red giant, the star loses a lot of mass, then begins to burn helium at its core. Some stars will have lost so much mass at the end of this process, up to 85 percent of their envelopes, that most of the envelope is gone. What is left is a very hot ultraviolet-bright core, or extreme horizontal branch star. Blue dots scattered throughout the image are hot, young stars in the Small Magellanic Cloud, a satellite galaxy of the Milky Way located approximately 200,000 light-years away. The stars in this galaxy are much brighter intrinsically than extreme horizontal branch stars, but they appear just as bright because they are farther away. The blue stars in the Small Magellanic Cloud are only about a few tens of millions of years old, much younger than the approximately 10-million-year-old stars in NGC 362.
Because NGC 362 sits on the northern edge of the Small Magellanic Cloud galaxy, the blue stars are denser toward the south, or bottom, of the image. Some of the yellow spots in this image are stars in the Milky Way galaxy that are along this line of sight. Astronomers believe that some of the other spots, particularly those closer to NGC 362, might actually be a relatively ultraviolet-dim family of stars called "blue stragglers." These stars are formed from collisions or close encounters between two closely orbiting stars in a globular cluster. "This observation could only be done with the Galaxy Evolution Explorer because it is the only ultraviolet imager available to the astronomical community with such a large field of view," said Schiavon.
This image is a false-color composite, where light detected by the Galaxy Evolution Explorer's far-ultraviolet detector is colored blue, and light from the telescope's near-ultraviolet detector is red.2
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