Space space

The Orion Nebula

The Orion Nebula

You're probably thinking of galaxies buddy.

I wish there was a way that we could travel to other universes without dying in the process from old age or other causes. But sadly that only seems to happen in the movies...

The Orion nebula is inside our own galaxy, and relatively close by.

Next there's a Metallica song he should hear.

Views of Pluto Through the Years.

Views of Pluto Through the Years.

One of the amazing things is that the New Horizons probe, which recently took the best images we have of Pluto, was launched 11 years ago.

It is honestly so amazing how far technology has come in such a short span

Yeah! the people involved had to calculate where Pluto was going to be 10 years from the day they launched, I can't even imagine the factors they would have to account for. Pluto hasn't even completed its orbit since we discovered it.

Just imagine the next short span!

Animation of the pulsar at the center of the Crab Nebula over the course of a year. The inner X-ray ring is thought to be a shock wave that marks the boundary between the surrounding nebula and the flow of matter and antimatter particles from the pulsar.

Animation of the pulsar at the center of the Crab Nebula over the course of a year. The inner X-ray ring is thought to be a shock wave that marks the boundary between the surrounding nebula and the flow of matter and antimatter particles from the pulsar.

Here is a link if u want to listen to what different pulsars sound like (recorded using radio telescopes) including the crab pulsar.

Rotating about 30 times a second.

2πr .. radius of 10km, means it has a circumference of 62.83 km

62.83 km every 1/30th of a second... 1884.96 km/second

So its equator is moving 6.79 million kilometers per hour (4.22 million miles per hour). 0.6% the speed of light.

Edit: according to that page, the fastest-rotating pulsar known, PSR B1937+21, spins 642 times per second, 1/7 the speed of light. Its radio signature sounds like a flute.

"A new movie (from 2011) from NASA's Chandra X-ray Observatory shows a sequence of Chandra images of the Crab Nebula, taken over an interval of seven months. Dramatic variations are seen, including the expansion of a ring of X-ray emission around the pulsar (white dot near center) and changes in the knots within this ring.

However, arguably the most striking result of these observations is the variations that were not observed, or in analogy with a famous Sherlock Holmes story1, this could be a case where the fact that the dog that did not bark helps to solve a mystery.

The pulsar at the center of the Crab Nebula is a neutron star that spins around about 30 times a second. It was created from a supernova explosion in our galaxy that was observed by astronomers in China and other countries in the year 1054.

As the young pulsar slows down, large amounts of energy are injected into its surroundings. In particular, a high-speed wind of matter and anti-matter particles plows into the surrounding nebula, creating a shock wave that forms the expanding ring seen in the movie. Jets from the poles of the pulsar spew X-ray emitting matter and antimatter particles in a direction perpendicular to the ring."

Here's an amazing view of the pulsar.

"This image gives the first clear view of the faint boundary of the Crab Nebula's X-ray-emitting pulsar wind nebula. The nebula is powered by a rapidly rotating, highly magnetized neutron star, or pulsar (white dot near the center). The combination of rapid rotating and strong magnetic field generates an intense electromagnetic field that creates jets of matter and anti-matter moving away from the north and south poles of the pulsar, and an intense wind flowing out in the equatorial direction.

The inner X-ray ring is thought to be a shock wave that marks the boundary between the surrounding nebula and the flow of matter and antimatter particles from the pulsar. Energetic electrons and positrons (antielectrons) move outward from this ring to brighten the outer ring and produce an extended X-ray glow.

The fingers, loops, and bays in the image all indicate that the magnetic field of the nebula and filaments of cooler matter are controlling the motion of the electrons and positrons. The particles can move rapidly along the magnetic field and travel several light years before radiating away their energy. In contrast, they move much more slowly perpendicular to the magnetic field, and travel only a short distance before losing their energy.

This effect can explain the long, thin, fingers and loops, as well as the sharp boundaries of the bays. The conspicuous dark bays on the lower right and left are likely due to the effects of a toroidal magnetic field that is a relic of the progenitor star."

The pulsar has 1.6x the mass of our sun.

It's 20km in diameter.


Sharpless 308: Star Bubble

Sharpless 308: Star Bubble

If I'm not misinterpreting this NASA page, that thing is so big that even from 5,200 light years away it still takes up more of our sky than a full moon. Imagine how different the human experience and our scientific understanding would be if we could just see this thing with the naked eye?

Great photo. I do see a chubby Dolphin head with the nose along the left side tho haha

If i could see any other celestial object, other than the moon and sun, I would be so happy. Maybe like a Mars flyby-close encounter.

I mean, you can (even with the naked eye), just not in detail.

Clouds casting thousand-mile shadows when viewed from the ISS

Clouds casting thousand-mile shadows when viewed from the ISS

That's such a cool image. The clouds look sorta transparent in their shadows. Neat.

This is my first IDidTheMath.

To cast a 1000 mile shadow, we'd need something 129 miles tall, counting from the surface.

Earth's circumference is around 25,000 miles. Assuming the shadow is parallel and ends right at the terminator line, a 1000 mile shadow on the surface would cover 14.4 degrees of the earth's curvature. Using trigonometry and pythagoras theorem, our object is 0.0324 the radius of the Earth. That is roughly 129 miles.

And yet a tiny beam of sunlight manages to travel all that way through space, penetrate the atmosphere, dodge the clouds, slip straight between my blinds, and hit me directly in the eyeball at 8 in the fucking morning, 10 minutes before my alarm goes off.

false, maybe 100-300 miles long but I know for a fact that there has never be a cloud over the New Mexico/Texas boarder that has cast a shadow all the way to Alabama

The Dzhanibekov Effect

I just broke my phone screen. Thanks.

This effect can also be demonstrated with your mobile phone. Try to spin it on its short axis, the rotation will be relatively stable, now try to spin the phone on its long axis, you will never get a perfect spin, as the rotation will always be accompanied by other rotations on other axis, because this spin is unstable. The effect occurs whenever the axis of rotation differs slightly from the object's second principal axis; air resistance or gravity are not necessary.

Video about this phenonmenon by Veritasium skip to 2:22

For all the insufferable and innumerable posts about "do you think there's aliens, guys" or "I want to go to space soooooo baaaaaaaad lol" or "I have a theory about time travel," this is why I remain in the sub. This is fascinating.

I just murdered an entire town and drank the blood of all its children. Thanks.

A rocket leaving Earth's atmosphere

A rocket leaving Earth's atmosphere

Kind of looks like a snowy landscape with a frosty tree branch stuck in the ground but I might have just been staring at it too long. Awesome photo.

You could repost this with the title "All that's left of the first flag planted at the South Pole" and people would probably buy it.

Everytime I see something like this, I give a lil applause for our fellow mankind.

New building in Dubai Reaches New Heights, Opening 2019

NASA's Juno spacecraft captured this image of Jupiter's cloud tops.

NASA's Juno spacecraft captured this image of Jupiter's cloud tops.

imagine seeing some big ass structure peaking out above the clouds

This was my first thought, some wizard standing in a storm conjuring some shit.

I've been listening to Star Talk recently, and I'll tell you what, shit is extremely interesting.

Wow living in jupiter would be like living in a Van Gogh painting

PS. I know jupiter is a gas planet and cant possible live on it if i am not wrong(or stupid)!

Nah everyone knows wizards are from the moon.

Enterprise, Endeavour, and 35 Years In-Between

Enterprise, Endeavour, and 35 Years In-Between

Awesome photo man! Did you see the space shuttle land on the runway?

Thanks! I never got to see a launch or landing, unfortunately. These were both taken at Ellington Air Field in Houston (near Johnson Space Center).

I was in a plane once that landed on the Shuttle runway at Kennedy Space Center. That was interesting because the runway is so long, the plane just landed and coasted/braked to a stop rather than the usual engine-reversal method (?) for slowing down a plane.

Total speculation here, but I think what the second one is missing is promise. The combination of the child and the old photo, at a time when the space shuttle was a thing like nobody had ever seen before give a hopeful, inspiring feeling even WITH the knowledge we have now. The second one, with its more modern context and an older person, allows some of the heavier thoughts about the shuttle program to creep in.

Wow thats crazy. I would have loved to see that happen. Too bad it got shut down. All I get to see is a rocket land on a barge lol😁

Endeavour to Orbit

Endeavour to Orbit

The creatures of this planet were constantly swayed by the whims of the heavens. Giant boulders would fall from the sky periodically, like hammers from god. Immense blasts of energy would irradiate the planet's atmosphere. And even the fluctuating moods of its parent star were enough to wreak havoc on the environment.

So in the midst of this constant rain, it was never a surprise that some of the hardened survivors would retaliate. And fire back.


The first bullet man created carried lead. It was a light piece of ammunition, loaded into a miniaturised cannon. But in its simplicity, it found man food, hurt their close enemies, and staved off would-be predators.

The next bullet carried gunpowder. No longer a simple piece of metal, these projectiles could kill efficiently from even greater distances. These were not clumsy rounds. Within them was the complete assurance of a kill.

The bullet that came after carried black powder and was much larger still; far more complex. These shells were built with the express purpose of ruining entire neighborhoods, punching through even the thickest of armor. And they increased the number of casualties with a single shot.

Man's next bullet could carry fissile material. These warheads required no cannon, no gun from which to fire it. It launched on its own. And within a few decades, humankind had the capacity of total and mutually assured destruction.

And the bullet that came after that?

It carried man. And in doing so, brought men to the moon.

Make no mistake. If there was ever a form of ammunition that could frighten and inspire all of humanity, then it is the bullet that needs no gun.

Though the sentiment isn't remotely original, I did string those words together. I hope it's a fitting caption to the image.

Did you make this up or is it from something

Try one of these subthreads