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Gulf of Alaska - The spring bloom in the Gulf of Alaska was well underway on April 12, 2017, when the Aqua/MODIS and Suomi-NPP/VIIRS data from which the above image was created were collected.

Credit: NASA/Goddard/NPP #nasagoddard #Earth #science #Alaska

NASA successfully launched the SubTec-7 payload on a Black Brant IX suborbital sounding rocket at 5:45 a.m. EDT, May 16, from the NASA's Wallops Flight Facility.

The payload flew to an altitude of about 154 miles before descending by parachute and landing in the Atlantic Ocean. SubTec-7 provided a flight test for more than 20 technologies to improve sounding rocket and spacecraft capabilities. Good data was received during the flight. The payload has been recovered.

Credit: NASA/Wallops #nasagoddard #rocket #space #science

NASA Aims to Create First-Ever Space-Based Sodium Lidar to Study Poorly Understood Mesosphere

A team of NASA scientists and engineers now believes it can leverage recent advances in a greenhouse-detecting instrument to build the world’s first space-based sodium lidar to study Earth’s poorly understood mesosphere.

Scientist Diego Janches and laser experts Mike Krainak and Tony Yu, all of whom work at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, are leading a research-and-development effort to further advance the sodium lidar, which the group plans to deploy on the International Space Station if it succeeds in proving its flightworthiness.
From its berth on the orbiting outpost, the instrument would illuminate the complex relationship between the chemistry and dynamics of the mesosphere that lies 40-100 miles above Earth’s surface — the region where Earth’s atmosphere meets the vacuum of space.

Credit: NASA/Goddard/W. Hrybyk #nasagoddard #science #space

The new GOES-16 satellite reveals the beauty and wonder of Earth from an equatorial view approximately 22,300 miles high.
Credit: NOAA/NASA #earth #nasagoddard

Hubble detects "kamikaze" comets plunging into a young star, 95 light-years from Earth.

This illustration shows several comets speeding across a vast protoplanetary disk of gas and dust and heading straight for the youthful, central star. These "kamikaze" comets will eventually plunge into the star and vaporize. The comets are too small to photograph, but their gaseous spectral "fingerprints" on the star's light were detected by NASA's Hubble Space Telescope. The gravitational influence of a suspected Jupiter-sized planet in the foreground may have catapulted the comets into the star. This star, called HD 172555, represents the third extrasolar system where astronomers have detected doomed, wayward comets. The star resides 95 light-years from Earth.

Read more: http://go.nasa.gov/2hZASqa

Credits: NASA, ESA, A. Feild and G. Bacon (STScI) #nasagoddard

Critical extra time that could help protect astronauts from space weather identified by NASA scientist

Our constantly-changing sun sometimes erupts with bursts of light, solar material, or ultra-fast energized particles — collectively, these events contribute to space weather. In a study published Jan. 30, 2017, in Space Weather, scientists from NASA and the National Center for Atmospheric Research, or NCAR, in Boulder, Colorado, have shown that the warning signs of one type of space weather event can be detected tens of minutes earlier than with current forecasting techniques – critical extra time that could help protect astronauts in space.

Earth’s magnetic field and atmosphere protect us on the ground from most of the harmful effects of space weather, but astronauts in low-Earth orbit — or even, one day, in interplanetary space — are more exposed to space weather, including bursts of fast-moving particles called solar energetic particles, or SEPs.

This composite image shows a coronal mass ejection, a type of space weather linked to solar energetic particles, as seen from two space-based solar observatories and one ground-based instrument. The image in gold is from NASA’s Solar Dynamics Observatory, the image in blue is from the Manua Loa Solar Observatory’s K-Cor coronagraph, and the image in red is from ESA and NASA’s Solar and Heliospheric Observatory.

Credits: NASA/ESA/SOHO/SDO/Joy Ng and MLSO/K-Cor #nasagoddard #sun #space #science

The most recent view of #HurricaneMatthew from space shows this massive storm converging on the Florida coast.

This visible image was captured Oct. 7 at 4:45 a.m. EDT from NOAA's GOES-East satellite.

Credits: NASA/NOAA GOES Project #nasagoddard #weather

NASA’s MAVEN Mission Observes Ups and Downs of Water Escape from Mars
After investigating the upper atmosphere of the Red Planet for a full Martian year, NASA’s MAVEN mission has determined that the escaping water does not always go gently into space.

Sophisticated measurements made by a suite of instruments on the Mars Atmosphere and Volatile Evolution, or MAVEN, spacecraft revealed the ups and downs of hydrogen escape – and therefore water loss. The escape rate peaked when Mars was at its closest point to the sun and dropped off when the planet was farthest from the sun. The rate of loss varied dramatically overall, with 10 times more hydrogen escaping at the maximum. “MAVEN is giving us unprecedented detail about hydrogen escape from the upper atmosphere of Mars, and this is crucial for helping us figure out the total amount of water lost over billions of years,” said Ali Rahmati, a MAVEN team member at the University of California at Berkeley who analyzed data from two of the spacecraft’s instruments.

Hydrogen in Mars’ upper atmosphere comes from water vapor in the lower atmosphere. An atmospheric water molecule can be broken apart by sunlight, releasing the two hydrogen atoms from the oxygen atom that they had been bound to. Several processes at work in Mars’ upper atmosphere may then act on the hydrogen, leading to its escape.

Credit: NASA #nasagoddard #mars #space #planet

This image from the NASA/ESA Hubble Space Telescope shows the unusual galaxy IRAS 06076-2139, found in the constellation Lepus (The Hare). Hubble’s Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) instruments observed the galaxy from a distance of 500 million light-years.

This particular object stands out from the crowd by actually being composed of two separate galaxies rushing past each other at about 2 million kilometers (1,243,000 miles) per hour. This speed is most likely too fast for them to merge and form a single galaxy. However, because of their small separation of only about 20,000 light-years, the galaxies will distort one another through the force of gravity while passing each other, changing their structures on a grand scale.

Such galactic interactions are a common sight for Hubble, and have long been a field of study for astronomers. The intriguing behaviors of interacting galaxies take many forms; galactic cannibalism, galaxy harassment and even galaxy collisions. The Milky Way itself will eventually fall victim to the latter, merging with the Andromeda Galaxy in about 4.5 billion years. The fate of our galaxy shouldn’t be alarming though: while galaxies are populated by billions of stars, the distances between individual stars are so large that hardly any stellar collisions will occur.

Credit: ESA/Hubble & NASA #nasagoddard #space #science #galaxy

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#Rensta #Repost: @nasagoddard via @renstapp ···
“ Gigantic Wave Discovered in Perseus Galaxy Cluster

Combining data from NASA's Chandra X-ray Observatory with radio observations and computer simulations, an international team of scientists has discovered a vast wave of hot gas in the nearby Perseus galaxy cluster. Spanning some 200,000 light-years, the wave is about twice the size of our own Milky Way galaxy.

The researchers say the wave formed billions of years ago, after a small galaxy cluster grazed Perseus and caused its vast supply of gas to slosh around an enormous volume of space. "Perseus is one of the most massive nearby clusters and the brightest one in X-rays, so Chandra data provide us with unparalleled detail," said lead scientist Stephen Walker at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "The wave we've identified is associated with the flyby of a smaller cluster, which shows that the merger activity that produced these giant structures is still ongoing." Read more at nasa.gov

Credit: NASA's Goddard Space Flight Center/Stephen Walker #nasagoddard #space #science

#Repost @nasagoddard (@get_repost)
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Gulf of Alaska - The spring bloom in the Gulf of Alaska was well underway on April 12, 2017, when the Aqua/MODIS and Suomi-NPP/VIIRS data from which the above image was created were collected.

Credit: NASA/Goddard/NPP #nasagoddard #Earth #science #Alaska

Gulf of Alaska - The spring bloom in the Gulf of Alaska was well underway on April 12, 2017, when the Aqua/MODIS and Suomi-NPP/VIIRS data from which the above image was created were collected.

Credit: NASA/Goddard/NPP #nasagoddard #Earth #science #Alaska

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cercare di capire
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fino in fondo @neslimusic
#puoiguardare #neslimusic #piantegrasse #astronomy #nasa #nasagoddard #stars #astronauts #science #salento #loves_united_salento #salentoview #lecceview #photography #photograph

"Some stars aren’t born, they’re hatched from interstellar gas pockets called EGGS (Evaporating Gas Globules) at the end of vast tubes known as “elephant trunks.” #planets #ourmoon #oursolarsystem #starrynight #nightscaper #nightsky #outerspace #nasa #nasagram #nasabeyond #universetoday #astronomy #astronomer #hubblespacetelescope #hubbletelescope #nasagoddard #astrophotography #astrophoto #spacephoto #constellation #cosmos #nebulas #nebula Credit: NASA / Reuters

"The four moons of Saturn passing in front of their parent planet. The giant orange moon Titan casts a large shadow onto Saturn’s north polar hood. Below Titan, near the ring plane and to the left, is the moon Mimas, casting a much smaller shadow onto Saturn’s equatorial cloud tops. Farther to the left, and off Saturn’s disk, are the bright moons Dione and the fainter Enceladus." #planets #ourmoon #oursolarsystem #starrynight #nightscaper #nightsky #outerspace #nasa #nasagram #nasabeyond #planetsaturn #universetoday #astronomy #astronomer #hubblespacetelescope #hubbletelescope #nasagoddard #astrophotography #astrophoto #spacephoto #constellation #cosmos Credit: NASA / Reuters

When scientists at NASA say that humans are messing up the environment to the point where irreversible damage will make it uninhabitable for humans, we need to do something to keep our species alive. ⠀
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#sciencerules #NASAGoddard #climatechange #UNClimate

عکس بالا توسط تلسکوپ فضایی هابل ناسا از دو کهکشان واقع در صورت فلکی خرگوش گرفته شده، که در فاصله پانصد میلیون سال نوری از زمین قرار دارد. این دو کهکشان با سرعتی حدود دو میلیون کیلومتر در هر ساعت به سمت یکدیگر حرکت می کنند و از آنجایی که این سرعت بسیار بسیار بیشتر چیزی است که به این دو کهکشان اجازه ادغام با یکدیگر و تشکیل یک کهکشان واحد را بدهد، این دو کهکشان در زمان عبور از هم به دلیل فاصله و تفکیک کم شان (حدود بیست هزار سال نوری) از طریق نیروی گرانش ساختار یکدیگر را در مقیاس بزرگی به اندازه دو کهکشان تغییر خواهند داد! کهکشان راه شیری ما که زمین را در خودش جا داده خود در نهایت قربانی نوعی از رفتار کهکشان ها که اصطلاحا آدم خواری نامیده می شود خواهد بود! و با کهکشانی به نام آندرومدا ادغام خواهد ‌شد که این اتفاق چیزی در حدود چهار و نیم میلیارد سال دیگر رخ خواهد داد! اما سرنوشت کهکشان ما نباید یک دلنگرانی باشد چرا که وقتی کهکشان ها از میلیاردها ستاره تشکیل شده اند فاصله بین ستاره ها و سیارات منفرد بسیار بیشتر از آن چیزی است که برخورد ستاره ای رخ بدهد.
#nasagoddard #nasa #space

Watch our beautiful #Earth from above. #throwback
@Regrann from @nasagoddard - Happy Earth Day!

Explore the diverse colors, unique shapes and striking patterns of our very favorite planet, Earth - as only NASA can see it.

Credit: NASA/Goddard #nasagoddard #earthday #earth #science - #regrann

What our planets would look like if they were replaced by our moon 🌕✨ "Perhaps the hardest thing to wrap one's mind around in astronomy (or in anything, for that matter) is scale: just how big these objects are, how far away they lie, and how long ago they formed. How can anyone understand a planet that is more than 1,300 times the size of our own? Or the 93 million miles between us and the sun? And these are just measurements in our own solar system, a puny speck in the galaxy, to say nothing of the entire universe. Our intuitive sense of sizes, distances, and time are of little help when it comes to space.

Space artist Ron Miller has created a series of images that illustrate the sizes of the other planets in our solar system in a way that makes them a bit more accessible, showing what they would look like if they were 240,000 miles away -- the approximate distance of the moon from the Earth. He began with a picture of the moon over Death Valley (up top), and then calculated the number of degrees in the sky a given planet would take up at that distance. "For instance," he explained to me over email, "the moon covers just 1/2 a degree. Venus would cover about two degrees, so it would appear about four time larger than the moon." #astronomy #planets #nasa #astronaut #astronomer #astronauts #astroart #spaceart #outerspace #oursolarsystem #universetoday #nasagram #nasajpl #nasaglenn #kennedyspacecenter #nightsky #nightphotography #nightscaper #starrynight #galaxy #galaxies #cosmos #constellation #internationalspacestation #nasagoddard #johnsonspacecenter #nasabeyond #ourmoon Article Credit: REBECCA J. ROSEN

"James Webb Space Telescope Primary Mirror Prepared for Testing at Johnson Space Center. The towering primary mirror of NASA’s James Webb Space Telescope stands inside a cleanroom at NASA’s Johnson Space Center in Houston, where it will undergo its last cryogenic test before it is launched into space in 2018. In preparation for testing, the “wings” of the mirror (which consist of the three segments on each side) were spread open. This photo shows one fully deployed wing, and one that is moments from being fully deployed. An engineer observes the move.

The James Webb Space Telescope is the world’s most advanced space observatory. This engineering marvel is designed to unravel some of the greatest mysteries of the universe, from discovering the first stars and galaxies that formed after the big bang to studying the atmospheres of planets around other stars. It is a joint project of NASA, ESA (the European Space Agency) and the Canadian Space Agency." #BeyondOurUniverse #nasabeyond #johnsonspacecenter #nasajpl #nasagoddard #nasagalaxyplanet #nasaglenn #nasagram #outerspace #oursolarsystem #astronomy #universetoday #astronaut #galaxies #galaxy #milkyway #spacefacts #cosmos #nightsky #nightscaper #nightphotography #kennedyspacecenter #europeanspaceagency #canadianspaceagency #JWST #jameswebbspacetelescope #telescope
Image Credit: NASA/Chris Gunn.

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