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Physics and astronomy thread (1 Viewer)

Yeah we had it on sunday and are supposed to have it tonight. I have zero light pollution here and my house is on top of a knoll. So my northern view is completely unobstructed.

Just awesome
 
Pretty impressive here in Pennsylvania just after sunset. We got another less intense round a little after 10. It was a super clear night here, too bad I have a fair amount of light pollution and a lot of obstructions near the horizon. My oldest was waiting for a Southwest flight when I sent her the first photos and I told her to get a northward facing window seat just in case - she got some really neat photos over northern Indiana. Apparently she ended up having to take a bunch of photos for people on the other side of the plane.
 
El Floppo said:
Sand said:
You know you'd think we'd learn about listening to dire warnings. How much more clear can it be?

ALL THESE WORLDS ARE YOURS EXCEPT EUROPA. ATTEMPT NO LANDING THERE.

Click to expand...
Launch went off without a hitch.
Click to expand...
Funny enough in the press conference on this the lead JHU guy specifically said "we are attempting no landing there". :lmao:

It's a flyby only, but with uber instruments. As always I'm super excited to :nerd: out over cool pictures and results. Sadly nothing to see until 2031. :tumbleweed:
 


The powerful Euclid telescope has captured millions of stars and galaxies in a dazzling new mosaic — and it represents just the first piece of a massive puzzle the observatory has been designed to solve.

The European Space Agency mission, launched in July 2023, will create the largest and most accurate 3D map of the cosmos yet to help answer enduring questions about the “dark side” of the universe.

Scientists assembled the first piece of the map, which includes 208 gigapixels, from 260 observations made between March 25 and April 8. But it accounts for a tiny fraction of the broad survey that Euclid will make of the sky in the future, measuring the shape, distance and motion of billions of galaxies.

The mosaic, which includes about 100 million stars and galaxies, made its debut on October 15 at the International Astronautical Congress in Milan, Italy.

“This stunning image is the first piece of a map that in six years will reveal more than one third of the sky. This is just 1% of the map, and yet it is full of a variety of sources that will help scientists discover new ways to describe the Universe,” said Valeria Pettorino, Euclid project scientist at the ESA, in a statement.
 
Galileo said:
Stumbled across this famous photo that I hadn't seen in a while...not sure if it is linked in this thread previously, but it ought to be. This is the 5th Solvay Conference on Physics held in Belgium in 1927, perhaps the greatest collection of physics minds assembled in one place. 17 Nobel prize winners in this group.
Click to expand...
So much atomic physics from that group and just starting to get to quantum physics too (Heisenberg, Dirac, Born). It really was a golden age of physics from 1900 through 1950.
 
:wub:

NASA Yule log

- YouTube

Auf YouTube findest du die angesagtesten Videos und Tracks. Außerdem kannst du eigene Inhalte hochladen und mit Freunden oder gleich der ganzen Welt teilen.
youtu.be youtu.be
 
ginny update!

Despite crashing in Jan after flight 72, our little pal is still all systems go... Other than at least one of its rotors and her ability to fly. But all onboard systems are still functional and they are using her as a continuing weather station, recording telemetry, taking daily (martian sol) images and storing them onboard.

Unfortunately, Percy is 1.8m away already, so soon won't be able to receive data from ginny and relay that info to the orbiting satellite and back to us on earth. But it's got 20 years of capability left... So might get picked up by future missions.
 
Accident report from NASA. (Link to pic of final resting place below... Note rotor at far left of image, Ginny to far right)


What Happened
“When running an accident investigation from 100 million miles away, you don’t have any black boxes or eyewitnesses,” said Ingenuity’s first pilot, Håvard Grip of JPL. “While multiple scenarios are viable with the available data, we have one we believe is most likely: Lack of surface texture gave the navigation system too little information to work with.”

The helicopter’s vision navigation system was designed to track visual features on the surface using a downward-looking camera over well-textured (pebbly) but flat terrain. This limited tracking capability was more than sufficient for carrying out Ingenuity’s first five flights, but by Flight 72 the helicopter was in a region of Jezero Crater filled with steep, relatively featureless sand ripples.

One of the navigation system’s main requirements was to provide velocity estimates that would enable the helicopter to land within a small envelope of vertical and horizontal velocities. Data sent down during Flight 72 shows that, around 20 seconds after takeoff, the navigation system couldn’t find enough surface features to track.

Photographs taken after the flight indicate the navigation errors created high horizontal velocities at touchdown. In the most likely scenario, the hard impact on the sand ripple’s slope caused Ingenuity to pitch and roll. The rapid attitude change resulted in loads on the fast-rotating rotor blades beyond their design limits, snapping all four of them off at their weakest point — about a third of the way from the tip. The damaged blades caused excessive vibration in the rotor system, ripping the remainder of one blade from its root and generating an excessive power demand that resulted in loss of communications.
 
www.livescience.com

Bizarre Particles Keep Flying Out of Antarctica's Ice, and They Might Shatter Modern Physics

There's something out there that physicists have never seen before, and it's coming up from the bottom of the Earth. Scientists think it's a brand-new particle.
www.livescience.com www.livescience.com

There's something mysterious coming up from the frozen ground in Antarctica, and it could break physics as we know it.

Physicists don't know what it is exactly. But they do know it's some sort of cosmic ray — a high-energy particle that's blasted its way through space, into the Earth, and back out again. But the particles physicists know about — the collection of particles that make up what scientists call the Standard Model (SM) of particle physics — shouldn't be able to do that. Sure, there are low-energy neutrinos that can pierce through miles upon miles of rock unaffected. But high-energy neutrinos, as well as other high-energy particles, have "large cross-sections." That means that they'll almost always crash into something soon after zipping into the Earth and never make it out the other side.
Click to expand...
 
urbanhack said:
www.livescience.com

Bizarre Particles Keep Flying Out of Antarctica's Ice, and They Might Shatter Modern Physics

There's something out there that physicists have never seen before, and it's coming up from the bottom of the Earth. Scientists think it's a brand-new particle.
www.livescience.com www.livescience.com

There's something mysterious coming up from the frozen ground in Antarctica, and it could break physics as we know it.

Physicists don't know what it is exactly. But they do know it's some sort of cosmic ray — a high-energy particle that's blasted its way through space, into the Earth, and back out again. But the particles physicists know about — the collection of particles that make up what scientists call the Standard Model (SM) of particle physics — shouldn't be able to do that. Sure, there are low-energy neutrinos that can pierce through miles upon miles of rock unaffected. But high-energy neutrinos, as well as other high-energy particles, have "large cross-sections." That means that they'll almost always crash into something soon after zipping into the Earth and never make it out the other side.
Click to expand...
Click to expand...
Drones?
 
urbanhack said:
www.livescience.com

Bizarre Particles Keep Flying Out of Antarctica's Ice, and They Might Shatter Modern Physics

There's something out there that physicists have never seen before, and it's coming up from the bottom of the Earth. Scientists think it's a brand-new particle.
www.livescience.com www.livescience.com

There's something mysterious coming up from the frozen ground in Antarctica, and it could break physics as we know it.

Physicists don't know what it is exactly. But they do know it's some sort of cosmic ray — a high-energy particle that's blasted its way through space, into the Earth, and back out again. But the particles physicists know about — the collection of particles that make up what scientists call the Standard Model (SM) of particle physics — shouldn't be able to do that. Sure, there are low-energy neutrinos that can pierce through miles upon miles of rock unaffected. But high-energy neutrinos, as well as other high-energy particles, have "large cross-sections." That means that they'll almost always crash into something soon after zipping into the Earth and never make it out the other side.
Click to expand...
Click to expand...
Send Kurt Russell down there to check it out.
 
SFBayDuck said:
Astronomers Are Keeping an Eye on This Asteroid’s Odds of Hitting Earth: Researchers say there’s a 1.3 percent chance that the space rock 2024 YR4 could strike our planet — but not until December 2032.

Get the drilling crew ready.
Click to expand...

Lots of reports today that the odds have increased to 3.1 percent.

www.cbsnews.com

Odds of asteroid YR4 2024 hitting Earth in 2032 go up, then down again, in latest NASA analysis

The asteroid 2024 YR4 has a very small chance of striking Earth when its orbit briefly intersects our planet's in December 2032.
www.cbsnews.com www.cbsnews.com
 
roar_lions said:
SFBayDuck said:
Astronomers Are Keeping an Eye on This Asteroid’s Odds of Hitting Earth: Researchers say there’s a 1.3 percent chance that the space rock 2024 YR4 could strike our planet — but not until December 2032.

Get the drilling crew ready.
Click to expand...

Lots of reports today that the odds have increased to 3.1 percent.

www.cbsnews.com

Odds of asteroid YR4 2024 hitting Earth in 2032 go up, then down again, in latest NASA analysis

The asteroid 2024 YR4 has a very small chance of striking Earth when its orbit briefly intersects our planet's in December 2032.
www.cbsnews.com www.cbsnews.com
Click to expand...
NASA took it back down to 1.5%

blogs.nasa.gov

Planetary Defense Archives - NASA Science

blogs.nasa.gov blogs.nasa.gov
 
Don Quixote said:
roar_lions said:
SFBayDuck said:
Astronomers Are Keeping an Eye on This Asteroid’s Odds of Hitting Earth: Researchers say there’s a 1.3 percent chance that the space rock 2024 YR4 could strike our planet — but not until December 2032.

Get the drilling crew ready.
Click to expand...

Lots of reports today that the odds have increased to 3.1 percent.

www.cbsnews.com

Odds of asteroid YR4 2024 hitting Earth in 2032 go up, then down again, in latest NASA analysis

The asteroid 2024 YR4 has a very small chance of striking Earth when its orbit briefly intersects our planet's in December 2032.
www.cbsnews.com www.cbsnews.com
Click to expand...
NASA took it back down to 1.5%

blogs.nasa.gov

Planetary Defense Archives - NASA Science

blogs.nasa.gov blogs.nasa.gov
Click to expand...

If I’m understanding the science here - they’ll be able to see this asteroid for roughly another 2 months - at which point it will be outside our view until 2028 or so. That means the potential impact timeline when we’re able to view it again will only be 4 years out. That’s a bit unnerving.
 
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