נאס"א מציגה: חשבון האינסטגרם הכי יפה ברשת

The Hubble Space Telescope turns 25 years old today! Celebrate with us as we share incredible images from Hubble: In its first glimpse of the heavens following the successful December 1999 servicing mission, NASA's Hubble Space Telescope has captured a majestic view of a planetary nebula, the glowing remains of a dying, Sun-like star. This stellar relic, first spied by William Herschel in 1787, is nicknamed the "Eskimo" Nebula (NGC 2392) because, when viewed through ground-based telescopes, it resembles a face surrounded by a fur parka. In this Hubble telescope image, the "parka" is really a disk of material embellished with a ring of comet-shaped objects, with their tails streaming away from the central, dying star. The Eskimo's "face" also contains some fascinating details. Although this bright central region resembles a ball of twine, it is, in reality, a bubble of material being blown into space by the central star's intense "wind" of high-speed material. The Eskimo Nebula is about 5,000 light-years from Earth in the constellation Gemini. The picture was taken Jan. 10 and 11, 2000, with the Wide Field and Planetary Camera 2. The nebula's glowing gases produce the colors in this image: nitrogen (red), hydrogen (green), oxygen (blue), and helium (violet). Credit: NASA, Andrew Fruchter and the ERO Team [Sylvia Baggett (STScI), Richard Hook (ST-ECF), Zoltan Levay (STScI)] #Hubble25 #Hubble #Telescope #HST #Space #NASA

A photo posted by NASA (@nasa) on Apr 24, 2015 at 12:18pm PDT

Today at 3:26 p.m. EDT, a new crater was created on this region of Mercury's surface when our MESSENGER spacecraft slammed into the planet at about 8,750 mph! Among its many accomplishments, the MESSENGER mission determined Mercury's surface composition, revealed its geological history, discovered its internal magnetic field is offset from the planet's center, and verified its polar deposits are dominantly water ice. The large, 400-kilometer-diameter (250-mile-diameter), impact basin "Shakespeare" occupies the bottom left quarter of this image, acquired by the Mercury Dual Imaging System (MDIS) and Mercury Laser Altimeter (MLA) instruments aboard the spacecraft. The image is coded by topography. The tallest regions are colored red and are roughly 3 kilometers (1.9 miles) higher than low-lying areas such as the floors of impact craters, colored blue. The large crater on the left side of the image is "Janacek," with a diameter of 48 kilometers (30 miles). The Shakespeare impact basin is filled with smooth plains material, likely due to extensive lava flooding in the past. As of 24 hours before the impact, the current best estimates predict that the spacecraft will strike a ridge slightly to the northeast of Shakespeare. View this image to see more details of the predicted impact site and time. Image Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington #nasa #mercury #messenger #nasabeyond #space #science

A photo posted by NASA (@nasa) on Apr 30, 2015 at 2:07pm PDT

Enjoy mesmerizing views of our sun: Over a six-hour period on April 21, 2015, our Solar Dynamics Observatory (SDO) observed a wing-like prominence eruption from our sun. SDO views the sun in various wavelengths of the extreme ultraviolet, including 171 (shown in gold) and 304 (shown in orange) angstroms. Credit: NASA/SDO #sun #solar #nasa #space #sdo #eruption #uv

A video posted by NASA (@nasa) on May 2, 2015 at 10:47am PDT

Aboard the International Space Station, European Space Agency astronaut Samantha Cristoforetti posted this image at the end of the day Friday and wrote, "Good night from #space. Buona notte dallo spazio." Last week the station astronauts continued preparing for the next round of robotic refueling demonstrations while conducting various biomedical experiments and checkouts. Image Credit: NASA/ESA #iss #nasa #esa #spacestation #earth

A photo posted by NASA (@nasa) on May 3, 2015 at 11:55am PDT

We captured these images of a significant solar flare using our Solar Dynamics Observatory – as seen in the bright flash on the left – peaking at 6:11 p.m. EDT on May 5, 2015. Each image shows a different wavelength of extreme ultraviolet light that highlights a different temperature of material on the sun. By comparing different images, scientists can better understand the movement of solar matter and energy during a flare. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel. Image Credit: NASA/SDO/Wiessinger #nasa #sun #solarflare #sdo #nasabeyond #science

A photo posted by NASA (@nasa) on May 6, 2015 at 11:24am PDT

From a distance Saturn seems to exude an aura of serenity and peace. In spite of this appearance, Saturn is an active and dynamic world. Its atmosphere is a fast-moving and turbulent place with wind speeds in excess of 1,100 miles per hour (1,800 km per hour) in places. The lack of a solid surface to create drag means that there are fewer features to slow down the wind than on a planet like Earth. Mimas, to the upper-right of Saturn, has been brightened by a factor of 2 for visibility. Credit: NASA/JPL-Caltech/Space Science Institute #nasa #cassini @NASAJPL #saturn #planets #astronomy #science #nasabeyond

A photo posted by NASA (@nasa) on May 13, 2015 at 8:22am PDT

Coronal Loops Over a Sunspot Group The Atmospheric Imaging Assembly (AIA) instrument aboard NASA's Solar Dynamics Observatory (SDO) images the solar atmosphere in multiple wavelengths to link changes in the surface to interior changes. Its data includes images of the sun in 10 wavelengths every 10 seconds. When AIA images are sharpened a bit, such as this AIA 171Å channel image, the magnetic field can be readily visualized through the bright, thin strands that are called "coronal loops". Loops are shown here in a blended overlay with the magnetic field as measured with SDO's Helioseismic and Magnetic Imager underneath. Blue and yellow represent the opposite polarities of the magnetic field. The combined images were taken on Oct. 24, 2014, at 23:50:37 UT. Image Credit: NASA SDO #nasa #sdo #sun #coronalloops #solar #space #solardynamics

A photo posted by NASA (@nasa) on May 24, 2015 at 9:12am PDT

A team of astronomers using the Hubble Space Telescope found an unambiguous link between the presence of supermassive black holes that power high-speed, radio-signal-emitting jets and the merger history of their host galaxies. Almost all galaxies with the jets were found to be merging with another galaxy, or to have done so recently. The team studied a large selection of galaxies with extremely luminous centers - known as active galactic nuclei - thought to be the result of large quantities of heated matter circling around and being consumed by a supermassive black hole. While most galaxies are thought to host supermassive black holes, only a small percentage of them are this luminous and fewer still go one step further and form what are known as relativistic jets. The two high-speed jets of plasma move almost at the speed of light and stream out in opposite directions at right angles to the disc of matter surrounding the black hole, extending thousands of light-years into space. Image credit: NASA/ESA/STScI #nasa #astronomy #space #hubble #hubble25 #hst #esa #blackhole #galaxy #science

A photo posted by NASA (@nasa) on May 31, 2015 at 8:08am PDT

Astronomers have used our Chandra X-ray Observatory to show that, multiple eruptions from a supermassive black hole over 50 million years have rearranged the cosmic landscape at the center of a group of galaxies. Scientists discovered this history of black hole eruptions by studying NGC 5813, a group of galaxies about 105 million light years from Earth. These Chandra observations are the longest ever obtained of a galaxy group, lasting for just over a week. The Chandra data are shown in this new composite image where the X-rays from Chandra (purple) have been combined with visible light data (red, green and blue). Credit: NASA #nasa #chandra #blackhole #science

A photo posted by NASA (@nasa) on Jun 15, 2015 at 4:35am PDT

This Hubble Space Telescope image shows a planetary nebula named NGC 6153, located about 4,000 light-years away in the southern constellation of Scorpius (The Scorpion). The faint blue haze across the frame shows what remains of a star like the sun after it has depleted most of its fuel. When this happens, the outer layers of the star are ejected, and get excited and ionized by the energetic ultraviolet light emitted by the bright hot core of the star, forming the nebula. NGC 6153 is a planetary nebula that is elliptical in shape, with an extremely rich network of loops and filaments, shown clearly in this Hubble image. Measurements show that NGC 6153 contains large amounts of neon, argon, oxygen, carbon and chlorine - up to three times more than can be found in the solar system. Image credit: ESA/Hubble & NASA, Acknowledgement: Matej Novak #nasa #space #hubble #hubble25 #hst #astronomy #nebula #science

A photo posted by NASA (@nasa) on Jun 26, 2015 at 8:04am PDT

Happy 4th of July! We present some stellar fireworks! Stars are essentially giant fusion reactions occurring in the vacuum of space. Because stars have so much mass, they possess powerful gravitational force-but they don't collapse because of the outward force generated by nuclear fusion, continually converting hydrogen atoms to helium. Sometimes stars begin orbiting each other, forming a binary star system. Typically this involves a white dwarf star and a red giant. Orbiting the red giant like a moon, the dwarf star rips matter from its companion until it essentially gags on the excess, coughing hot gas and radiation into space. This dramatic phenomenon is relatively common, and the white dwarf is not destroyed in the resulting nova. Image Credit: NASA #nasa #space #astronomy #science #fourthofjuly #happyindependenceday #independenceday #4thofjuly #fireworks

A photo posted by NASA (@nasa) on Jul 4, 2015 at 7:42am PDT

Although the Quintuplet Cluster gained its name due to its five brightest stars, it is home to hundreds more. The huge number of massive young stars in the cluster is clearly captured in this Hubble Space Telescope image. The cluster is just 100 light-years from the center of our galaxy. The Quintuplet Cluster hosts two extremely rare luminous blue variable stars: the Pistol Star, one of the most luminous known stars in the Milky Way. The exact age and future of the Pistol Star are uncertain, but it is expected to end in a supernova or even a hypernova in one to three million years. The cluster also contains a number of red supergiants, the largest in the galaxy and are burning their fuel at an incredible speed, meaning they will have a very short lifetime. Image credit: ESA/NASA #nasa #space #hubble #hubble25 #astronomy #galaxy #telescope #hst #science

A photo posted by NASA (@nasa) on Jul 18, 2015 at 8:06am PDT

Happy #EarthDay! Here's a #NASA look at Alaska's Columbia Glacier in infrared false-color. Now show us your favorite places on Earth. Share pictures and video of your favorite place on Earth. Just be sure to include the hashtag ‪#‎NoPlaceLikeHome‬ – no matter what social media platform you're posting on. Scientists have long studied Alaska's fast-moving Columbia Glacier, a tidewater glacier that descends through the Chugach Mountains into Prince William Sound. Yet the river of ice continues to deliver new surprises. Image Credit: NASA #earth #space #alaska #earthrightnow #earthday2015 #science

A photo posted by NASA (@nasa) on Apr 22, 2015 at 11:17am PDT

Fierce black hole "wind" linked to galactic clearing of star-making gas: By combining observations from the Japan-led Suzaku X-ray satellite and the European Space Agency's infrared Herschel Space Observatory, scientists have connected a fierce "wind" produced near a galaxy's monster black hole to an outward torrent of cold gas a thousand light-years across. The finding validates a long-suspected feedback mechanism enabling a supermassive black hole to influence the evolution of its host galaxy. This artist's rendering shows a galaxy being cleared of interstellar gas, the building blocks of new stars. New X-ray observations by Suzaku have identified a wind emanating from the black hole's accretion disk that ultimately drives such outflows. Image Credit: ESA/ATG Medialab

A photo posted by NASA (@nasa) on Mar 25, 2015 at 12:19pm PDT

This artist's concept illustrates the Milky Way galaxy. Living on the Edge: Stars Found Far from Galaxy Center: Astronomers using data from our Wide-field Infrared Survey Explorer, or WISE, have found a cluster of stars forming at the very edge of our Milky Way galaxy. The newfound young star clusters lie thousands of light-years below the plane of our Milky Way galaxy, a flat spiral disk seen in this artist's conception. If alien lifeforms were to develop on planets orbiting these stars, they would have views of a portion, or all, of the galactic disk. Image credit: NASA/JPL-Caltech (artist concept) #nasa #galaxy #space #wise #astronomy #milkyway #science

A photo posted by NASA (@nasa) on Mar 2, 2015 at 4:49pm PST

Curly-Q Filament Blast: A solar filament erupted in the shape of a twisted arch over a three-hour period (Feb. 4, 2015) with most of it falling back into the sun. The activity in the lower corona was caught in a wavelength of extreme ultraviolet light. Filaments are elongated clouds of particles suspended above the Sun's surface by magnetic forces. They are notoriously unstable. Credit: Solar Dynamics Observatory, NASA #nasa #sun #sdo #space #spaceweather #science

A photo posted by NASA (@nasa) on Feb 6, 2015 at 6:12pm PST