Xuebing Du
"I'm Dorothy Gale from Kansas"
Sade Olutola
Aqua Utopia|海の底で記憶を紡ぐ

祝日 / Permanent Vacation
h
occasionally subtle
No title available

Love Begins
🪼

oozey mess
Show & Tell
YOU ARE THE REASON
2025 on Tumblr: Trends That Defined the Year

Kaledo Art

Janaina Medeiros
Mike Driver
I'd rather be in outer space 🛸

ellievsbear
art blog(derogatory)

seen from Germany
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seen from United Kingdom
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@ideliciouslythoughtfulcollection
He’s so excited to go for his walk 😂
NASA Visualization Shows a Black Hole’s Warped World
NASA Goddard Space Flight Center logo. Sept. 25, 2019 This new visualization of a black hole illustrates how its gravity distorts our view, warping its surroundings as if seen in a carnival mirror. The visualization simulates the appearance of a black hole where infalling matter has collected into a thin, hot structure called an accretion disk. The black hole’s extreme gravity skews light emitted by different regions of the disk, producing the misshapen appearance. Bright knots constantly form and dissipate in the disk as magnetic fields wind and twist through the churning gas. Nearest the black hole, the gas orbits at close to the speed of light, while the outer portions spin a bit more slowly. This difference stretches and shears the bright knots, producing light and dark lanes in the disk.
Animation above: Seen nearly edgewise, the turbulent disk of gas churning around a black hole takes on a crazy double-humped appearance. The black hole’s extreme gravity alters the paths of light coming from different parts of the disk, producing the warped image. The black hole’s extreme gravitational field redirects and distorts light coming from different parts of the disk, but exactly what we see depends on our viewing angle. The greatest distortion occurs when viewing the system nearly edgewise. Animation Credits: NASA’s Goddard Space Flight Center/Jeremy Schnittman. Viewed from the side, the disk looks brighter on the left than it does on the right. Glowing gas on the left side of the disk moves toward us so fast that the effects of Einstein’s relativity give it a boost in brightness; the opposite happens on the right side, where gas moving away us becomes slightly dimmer. This asymmetry disappears when we see the disk exactly face on because, from that perspective, none of the material is moving along our line of sight.
Image above: This image highlights and explains various aspects of the black hole visualization. Image Credits: NASA’s Goddard Space Flight Center/Jeremy Schnittman. Closest to the black hole, the gravitational light-bending becomes so excessive that we can see the underside of the disk as a bright ring of light seemingly outlining the black hole. This so-called “photon ring” is composed of multiple rings, which grow progressively fainter and thinner, from light that has circled the black hole two, three, or even more times before escaping to reach our eyes. Because the black hole modeled in this visualization is spherical, the photon ring looks nearly circular and identical from any viewing angle. Inside the photon ring is the black hole’s shadow, an area roughly twice the size of the event horizon — its point of no return.
Image above: Seen nearly edgewise, the turbulent disk of gas churning around a black hole takes on a crazy double-humped appearance. The black hole’s extreme gravity alters the paths of light coming from different parts of the disk, producing the warped image. Image Credits: NASA’s Goddard Space Flight Center/Jeremy Schnittman. “Simulations and movies like these really help us visualize what Einstein meant when he said that gravity warps the fabric of space and time,” explains Jeremy Schnittman, who generated these gorgeous images using custom software at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “Until very recently, these visualizations were limited to our imagination and computer programs. I never thought that it would be possible to see a real black hole.” Yet on April 10, the Event Horizon Telescope team released the first-ever image of a black hole’s shadow using radio observations of the heart of the galaxy M87. Related links: Black Holes: https://www.nasa.gov/black-holes Goddard Space Flight Center (GSFC): https://www.nasa.gov/centers/goddard/home/index.html Animation (mentioned), Images (mentioned), Text, Credits: NASA/Rob Garner/Goddard Space Flight Center, by Francis Reddy. Greetings, Orbiter.ch Full article
Demonstration Of Constant Velocity With A Moving Trampoline
petersonnaturephotos
SOUND ON!
This video of a muskrat eating is from last Sunday about 10 minutes after sunset.
stxkos
Look at this big male. Nightly occurrences in my back yard. This foo almost grabbed my 📱😅.
Janek Sedlář
Breaking open an Obsidian rock. According to mudbloodead, “I’m an archaeology student and my professors favorite fun fact is that obsidian is sharper than surgical steel. Also it can shatter and the dust can get in your eyes and blind you.”
Some tools for neuroscience are made with obsidian flake, to avoid touching a nerve with conductive metal tools. :)
source: norlington3
Westminster Bridge in happier times, 1964.
Much happier…
Another one was sent to Gulag
This cat’s peculiar jumping style
whitbyfossils
Nice bit of scattered paddle I found back in March. After a quick clean up by @speedymark0 , it’s looking very nice.
Buzz Aldrin and Neil Armstrong on the Moon, July 20, 1969. Taken from the camera on the lunar module.
Flying fox taking off
What Space Weather Means for You
In space, invisible, fast-moving particles from the Sun and other sources in deep space zip around, their behavior shaped by dynamic electric and magnetic fields. There are so few of these particles that space is considered a vacuum, but what’s there packs a punch. Together, we call all of this invisible activity space weather — and it affects our technology both in space and here on Earth.
This month, two new missions are launching to explore two different kinds of space weather.
Scrambled signals
Many of our communications and navigation systems — like GPS and radio — rely on satellites to transmit their signals. When signals are sent from satellites down to Earth, they pass through a dynamic zone on the upper edge of Earth’s atmosphere called the ionosphere.
Gases in the ionosphere have been cooked into a sea of positive- and negative-charged particles by solar radiation. These electrically charged particles are also mixed in with neutral gases, like the air we breathe. The charged particles respond to electric and magnetic fields, meaning they react to space weather. Regular weather can also affect this part of the atmosphere.
Influenced by this complicated web of factors, structured bubbles of charged gas sometimes form in this part of the atmosphere, particularly near the equator. When signals pass through these bubbles, they can get distorted, causing failed communications or inaccurate GPS fixes.
Right now, it’s hard to predict just when these bubbles will form or how they’ll mess with signals. The two tiny satellites of the E-TBEx mission will try to shed some light on this question.
As these CubeSats fly around Earth, they’ll send radio signals to receiving stations on the ground. Scientists will examine the signals received in order to see whether — and if so, how much — they were jumbled as they traveled through the upper atmosphere and down to Earth.
All together, this information will give scientists a better idea of how these bubbles form and change and how much they disrupt signals — information that could help develop strategies for mitigating these bubbles’ disruptive effects.
Damaged satellites
The high-energy, fast-moving particles that fill space are called radiation. Every single spacecraft — from scientific satellites sprinkled throughout the solar system to the communications satellites responsible for relaying the GPS signals we use every day — must weather the harsh radiation of space.
Strikes from tiny, charged particles can spark memory damage or computer upsets on spacecraft, and over time, degrade hardware. The effects are wide-ranging, but ultimately, radiation can impact important scientific data, or prevent people from getting the proper navigation signals they need.
Space Environment Testbeds — or SET, for short — is our mission to study how to better protect satellites from space radiation.
SET aims its sights on a particular neighborhood of near-Earth space called the slot region: the gap between two of Earth’s vast, doughnut-shaped radiation belts, also known as the Van Allen Belts. The slot region is thought to be calmer than the belts, but known to vary during extreme space weather storms driven by the Sun. How much it changes exactly, and how quickly, remains uncertain.
The slot region is an attractive one for satellites — especially commercial navigation and communications satellites that we use every day — because from about 12,000 miles up, it offers not only a relatively friendly radiation environment, but also a wide view of Earth. During intense magnetic storms, however, energetic particles from the outer belt can surge into the slot region.
SET will survey the slot region, providing some of the first day-to-day weather measurements of this particular neighborhood in near-Earth space. The mission also studies the fine details of how radiation damages instruments and tests different methods to protect them, helping engineers build parts better suited for spaceflight. Ultimately, SET will help other missions improve their design, engineering and operations to avoid future problems, keeping our space technology running smoothly as possible.
For more on our space weather research, follow @NASASun on Twitter and NASA Sun Science on Facebook.
Meet the other NASA missions launching on the Department of Defense’s STP-2 mission and get the latest updates at nasa.gov/spacex.
Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.
Constellation by slowhand7530
bbcearthfeelalive
The Colors on this Mantis Shrimp 😍💙 Despite their NameSake and relatively puny stature, #MantisShrimp aren’t #Shrimp at all.⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
They’re Stomatopods, distant relatives to Crabs, Shrimp, and Lobsters