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Nasa - Blog Posts
Do you like the color of the Sun?
Get ready to be dazzled by the true spectrum of solar beauty. From fiery reds to cool blues, explore the vibrant hues of the Sun in a mesmerizing color order. These images were taken in a wavelength of extreme ultraviolet light to clearly see any activity on the surface of the Sun — giving scientists a wealth of data for solar studies.
Black Hole Friday Deals!
Get these deals before they are sucked into a black hole and gone forever! This “Black Hole Friday,” we have some cosmic savings that are sure to be out of this world.
Your classic black holes — the ultimate storage solution.
Galactic 5-for-1 special! Learn more about Stephan’s Quintet.
Limited-time offer game DLC! Try your hand at the Roman Space Observer Video Game, Black Hole edition, available this weekend only.
Standard candles: Exploding stars that are reliably bright. Multi-functional — can be used to measure distances in space!
Feed the black hole in your stomach. Spaghettification’s on the menu.
Act quickly before the stars in this widow system are gone!
Add some planets to your solar system! Grab our Exoplanet Bundle.
Get ready to ride this (gravitational) wave before this Black Hole Merger ends!
Be the center of attention in this stylish accretion disk skirt. Made of 100% recycled cosmic material.
Should you ever travel to a black hole? No. But if you do, here’s a free guide to make your trip as safe* as possible. *Note: black holes are never safe.
Make sure to follow us on Tumblr for your regular dose of space!
Astronomers used three of NASA's Great Observatories to capture this multiwavelength image showing galaxy cluster IDCS J1426.5+3508. It includes X-rays recorded by the Chandra X-ray Observatory in blue, visible light observed by the Hubble Space Telescope in green, and infrared light from the Spitzer Space Telescope in red. This rare galaxy cluster has important implications for understanding how these megastructures formed and evolved early in the universe.
How Astronomers Time Travel
Let’s add another item to your travel bucket list: the early universe! You don’t need the type of time machine you see in sci-fi movies, and you don’t have to worry about getting trapped in the past. You don’t even need to leave the comfort of your home! All you need is a powerful space-based telescope.
But let’s start small and work our way up to the farthest reaches of space. We’ll explain how it all works along the way.
This animation illustrates how fast light travels between Earth and the Moon. The farther light has to travel, the more noticeable its speed limit becomes.
The speed of light is superfast, but it isn’t infinite. It travels at about 186,000 miles (300 million meters) per second. That means that it takes time for the light from any object to reach our eyes. The farther it is, the more time it takes.
You can see nearby things basically in real time because the light travel time isn’t long enough to make a difference. Even if an object is 100 miles (161 kilometers) away, it takes just 0.0005 seconds for light to travel that far. But on astronomical scales, the effects become noticeable.
This infographic shows how long it takes light to travel to different planets in our solar system.
Within our solar system, light’s speed limit means it can take a while to communicate back and forth between spacecraft and ground stations on Earth. We see the Moon, Sun, and planets as they were slightly in the past, but it's not usually far enough back to be scientifically interesting.
As we peer farther out into our galaxy, we use light-years to talk about distances. Smaller units like miles or kilometers would be too overwhelming and we’d lose a sense of their meaning. One light-year – the distance light travels in a year – is nearly 6 trillion miles (9.5 trillion kilometers). And that’s just a tiny baby step into the cosmos.
The Sun’s closest neighboring star, Proxima Centauri, is 4.2 light-years away. That means we see it as it was about four years ago. Betelgeuse, a more distant (and more volatile) stellar neighbor, is around 700 light-years away. Because of light’s lag time, astronomers don’t know for sure whether this supergiant star is still there! It may have already blasted itself apart in a supernova explosion – but it probably has another 10,000 years or more to go.
What looks much like craggy mountains on a moonlit evening is actually the edge of a nearby, young, star-forming region NGC 3324 in the Carina Nebula. Captured in infrared light by the Near-Infrared Camera (NIRCam) on NASA’s James Webb Space Telescope, this image reveals previously obscured areas of star birth.
The Carina Nebula clocks in at 7,500 light-years away, which means the light we receive from it today began its journey about 3,000 years before the pyramids of Giza in Egypt were built! Many new stars there have undoubtedly been born by now, but their light may not reach Earth for thousands of years.
An artist’s concept of our Milky Way galaxy, with rough locations for the Sun and Carina nebula marked.
If we zoom way out, you can see that 7,500 light-years away is still pretty much within our neighborhood. Let’s look further back in time…
This stunning image by the NASA/ESA Hubble Space Telescope features the spiral galaxy NGC 5643. Looking this good isn’t easy; 30 different exposures, for a total of nine hours of observation time, together with Hubble’s high resolution and clarity, were needed to produce an image of such exquisite detail and beauty.
Peering outside our Milky Way galaxy transports us much further into the past. The Andromeda galaxy, our nearest large galactic neighbor, is about 2.5 million light-years away. And that’s still pretty close, as far as the universe goes. The image above shows the spiral galaxy NGC 5643, which is about 60 million light-years away! That means we see it as it was about 60 million years ago.
As telescopes look deeper into the universe, they capture snapshots in time from different cosmic eras. Astronomers can stitch those snapshots together to unravel things like galaxy evolution. The closest ones are more mature; we see them nearly as they truly are in the present day because their light doesn’t have to travel as far to reach us. We can’t rewind those galaxies (or our own), but we can get clues about how they likely developed. Looking at galaxies that are farther and farther away means seeing these star cities in ever earlier stages of development.
The farthest galaxies we can see are both old and young. They’re billions of years old now, and the light we receive from them is ancient since it took so long to traverse the cosmos. But since their light was emitted when the galaxies were young, it gives us a view of their infancy.
This animation is an artist’s concept of the big bang, with representations of the early universe and its expansion.
Comparing how fast objects at different distances are moving away opened up the biggest mystery in modern astronomy: cosmic acceleration. The universe was already expanding as a result of the big bang, but astronomers expected it to slow down over time. Instead, it’s speeding up!
The universe’s expansion makes it tricky to talk about the distances of the farthest objects. We often use lookback time, which is the amount of time it took for an object’s light to reach us. That’s simpler than using a literal distance, because an object that was 10 billion light-years away when it emitted the light we received from it would actually be more than 16 billion light-years away right now, due to the expansion of space. We can even see objects that are presently over 30 billion light-years from Earth, even though the universe is only about 14 billion years old.
This James Webb Space Telescope image shines with the light from galaxies that are more than 13.4 billion years old, dating back to less than 400 million years after the big bang.
Our James Webb Space Telescope has helped us time travel back more than 13.4 billion years, to when the universe was less than 400 million years old. When our Nancy Grace Roman Space Telescope launches in a few years, astronomers will pair its vast view of space with Webb’s zooming capabilities to study the early universe in better ways than ever before. And don’t worry – these telescopes will make plenty of pit stops along the way at other exciting cosmic destinations across space and time.
Learn more about the exciting science Roman will investigate on X and Facebook.
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Of course Saturn brought its ring light.
On June 25, 2023, our James Webb Space Telescope made its first near-infrared observations of Saturn. The planet itself appears extremely dark at this infrared wavelength, since methane gas absorbs almost all the sunlight falling on the atmosphere. The icy rings, however, stay relatively bright, leading to Saturn’s unusual appearance in this image.
This new image of Saturn clearly shows details within the planet’s ring system, several of the planet’s moons (Dione, Enceladus, and Tethys), and even Saturn’s atmosphere in surprising and unexpected detail.
These observations from Webb are just a hint at what this observatory will add to Saturn’s story in the coming years as the science team delves deep into the data to prepare peer-reviewed results.
Download the full-resolution image, both labeled and unlabeled, from the Space Telescope Science Institute.
Make sure to follow us on Tumblr for your regular dose of space!
Sharp Nebula Shot!
IC 405 & 410 Mosaic - Flame and Tadpole Nebulas
C/2023 A3 (Tsuchinshan-ATLAS) 2024-10-23, clearest photo ever taken of a comet!
Such a beautiful universe! So much more waiting to be found
Scientists believe they've found evidence of what was once an ocean on Mars. Check out the shoreline on mars!
Clearest Image ever taken of Mars’ North Pole. Yes that’s water ice.
I got a gay one, nice
What Did NASA See on Your Birthday?
use this link — or google “Hubble birthday” — and enter your birth month and day to see what the Hubble Telescope saw on the day you were born! Then tag six (or more) people afterwards! Let’s see the what the galaxy looks like together :)
*feel free to click on “see full image” and just post the picture if you don’t want to share the date
For instance, this is mine:
tagging @greekgurlluv @peggy-sue-reads-a-book @scentedcandleibex @the-witching-atlas @inc0rrectmyths @hydexstudixs @dontwannadothisanymore @0lympian-c0uncil @genderfluidagendergremlin @candlecat624 @bluebellstudio @mythology-loving-lesbian @thatweirdkipgroup @marcelinethepastelqueen if you want to do this! (No pressure to, of course)
As always, you don’t need a tag to reblog this off me <3
It's so over (got stranded on Mars) we're so back (I can grow food here) it's so over (we left a guy on Mars) we're so back (we've established communication) it's so over (the airlock exploded and the crops froze) we're so back (we've cut down the launch window for a resupply) it's so over (the probe exploded) we're so back (the space program in China has been working on their own probe that can launch in the correct window to get him supplies) it's so over (we didn't tell the hermes crew about a separate possible mission) we're so back (the hermes crew committed mutiny and are now on the way to save Watney) it's so over (we have to remove the front of his spacecraft to get him into space) we're so back (we can cover the hole with a tarp) it's so over (the tarp ripped off during launch and the distance between the hermes and the mav is too wide) we're so back (we can use remaining thruster fuel to course correct) it's so over (if we do this we'll be going too fast) we're so back (we can build a bomb and blow up part of the station to slow us down) it's so over (there's still too much distance between the Hermes and Watney) we're so back (he poked a hole in his suit and flew to us like iron man)
Cosmic Cliffs in Carina © JWST
Happy Labor Day. Today I learned about probably the first strike to happen IN SPACE.
e t e r n a l b l i s s
YOOOOO THAT LOOKS SO COOL!!
Above image is a pride flag with every color band represented by a NASA image. White is Earth clouds, pink is aurora, blue is the Sun in a specific wavelength, brown is Jupiter clouds, black is the Hubble deep field, red is the top of sprites, orange is a Mars crater, yellow is the surface of Io, green is a lake with algae, blue is Neptune, and purple is the Crab Nebula in a specific wavelength.
I drew this yesterday for the raid but i forgot to post it 👽
