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THE EXPANSION VELOCITY OF A SUPERNOVA REMNANT SHOCKWAVE, IS LIKE ANY OTHER SHOCKWAVE, BUT IN A COSMIC SCALE -- A supernova remnant (SNR) is the remains of a supernova explosion. SNRs are extremely important for understanding our galaxy. They heat up the interstellar medium, distribute heavy elements throughout the galaxy, and accelerate cosmic rays.
Supernova remnants greatly impact the ecology of the Milky Way. If it were not for SNRs, there would be no Earth, and hence, no plants or animals or people. This is because all the elements heavier than iron were made in a supernova explosion, so the only reason we find these elements on Earth or in our Solar System — or any other extrasolar planetary system — is because those elements were formed during a supernova.
#science #astronomy
Supernova remnants greatly impact the ecology of the Milky Way. If it were not for SNRs, there would be no Earth, and hence, no plants or animals or people. This is because all the elements heavier than iron were made in a supernova explosion, so the only reason we find these elements on Earth or in our Solar System — or any other extrasolar planetary system — is because those elements were formed during a supernova.
#science #astronomy
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THE CRAB NEBULA, OTHERWISE KNOWN AS M1, NGC 1952, AND TARUS A -- IS AN AWE INSPIRING SUPERNOVA REMNANT IN THE CONSTELLATION TAURUS THAT TICKLES EVERYONE'S IMAGINATION. THIS IS THE LATEST 110 YEARS COMPOSITE. ♥
#science #astronomy
#science #astronomy
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STAR SUPERNOVA is a stellar explosion. During this explosion, luminous radiations are burst out and almost all of the material of the exploding star is expelled in outer space. So massive is the explosion that for a brief amount of time, the explosion actually outshines the entire galaxy in which it explodes. It is so bright that it literally takes weeks and sometimes months for the brightness to fade away.
Supernovae can create incredibly beautiful remnants. The result of this immense and apparently destructive force is often quite stunning. Some of the most famous stellar objects that we know of today – the go-to targets for astronomers – were created by supernovae that occurred hundreds or thousands of years ago. These classic sights include the Crab Nebula (M1) and Tycho’s Supernova Remnant (SN 1572).
Most chemical elements are made in a supernova. The normal process inside stars, stellar nucleosynthesis, fuses hydrogen to create the elements, from helium through the periodic table to iron. To create the heavier elements through to uranium, however, requires something exponentially hotter and more energetic even than the core of a star – those forces typically found in the instant of a supernova.
#science #astronomy
Supernovae can create incredibly beautiful remnants. The result of this immense and apparently destructive force is often quite stunning. Some of the most famous stellar objects that we know of today – the go-to targets for astronomers – were created by supernovae that occurred hundreds or thousands of years ago. These classic sights include the Crab Nebula (M1) and Tycho’s Supernova Remnant (SN 1572).
Most chemical elements are made in a supernova. The normal process inside stars, stellar nucleosynthesis, fuses hydrogen to create the elements, from helium through the periodic table to iron. To create the heavier elements through to uranium, however, requires something exponentially hotter and more energetic even than the core of a star – those forces typically found in the instant of a supernova.
#science #astronomy
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BLACK HOLES -- Imagine matter packed so densely that nothing can escape. Not a moon, not a planet and not even light. That’s what black holes are — a spot where gravity’s pull is huge, ending up being dangerous for anything that accidentally strays by.
You can’t directly see a black hole, WELL, because a black hole is indeed “black” — no light can escape from it — it’s impossible for us to sense the hole directly through our instruments, no matter what kind of electromagnetic radiation you use (light, X-rays, whatever.) The key is to look at the hole’s effects on the nearby environment. Say a star happens to get too close to the black hole, for example. The black hole naturally pulls on the star and rips it to shreds. When the matter from the star begins to bleed toward the black hole, it gets faster, gets hotter and glows brightly in X-rays.
There are at least three types of black holes, ranging from relative squeakers to those that dominate a galaxy’s center. Primordial black holes are the smallest kinds, and range in size from one atom’s size to a mountain’s mass. Stellar black holes, the most common type, are up to 20 times more massive than our own Sun and are likely sprinkled in the dozens within the Milky Way. And then there are the gargantuan ones in the centers of galaxies, called “supermassive black holes.” They’re each more than one million times more massive than the Sun. How these beasts formed is still being examined.
#science #astronomy #blackholes
You can’t directly see a black hole, WELL, because a black hole is indeed “black” — no light can escape from it — it’s impossible for us to sense the hole directly through our instruments, no matter what kind of electromagnetic radiation you use (light, X-rays, whatever.) The key is to look at the hole’s effects on the nearby environment. Say a star happens to get too close to the black hole, for example. The black hole naturally pulls on the star and rips it to shreds. When the matter from the star begins to bleed toward the black hole, it gets faster, gets hotter and glows brightly in X-rays.
There are at least three types of black holes, ranging from relative squeakers to those that dominate a galaxy’s center. Primordial black holes are the smallest kinds, and range in size from one atom’s size to a mountain’s mass. Stellar black holes, the most common type, are up to 20 times more massive than our own Sun and are likely sprinkled in the dozens within the Milky Way. And then there are the gargantuan ones in the centers of galaxies, called “supermassive black holes.” They’re each more than one million times more massive than the Sun. How these beasts formed is still being examined.
#science #astronomy #blackholes
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Those who contemplate the beauty of the earth find reserves of strength that will endure as long as life lasts. What makes earth feel like hell is our expectation that it should feel like heaven. GOOD MORNING AND HAVE A GREAT DAY EVERYONE... ♥
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THE SOMBRERO GALAXY, MY FAVORITE GALAXY -- also known as Messier Object 104, M104 or NGC 4594, it is an unbarred spiral galaxy in the constellation Virgo located 31 million light-years (9.5 Mpc) from Earth. The galaxy has a diameter of approximately 50,000 light-years, 30% the size of the Milky Way. It has a bright nucleus, an unusually large central bulge, and a prominent dust lane in its inclined disk. The dark dust lane and the bulge give this galaxy the appearance of a sombrero. Astronomers initially thought that the halo was small and light, indicative of a spiral galaxy, but Spitzer found that the halo around the Sombrero Galaxy is larger and more massive than previously thought, indicative of a giant elliptical galaxy. The galaxy has an apparent magnitude of +9.0, making it easily visible with amateur telescopes, and it is considered by some authors to be the brightest galaxy within a radius of 10 megaparsecs of the Milky Way. Its large bulge, its central supermassive black hole, and its dust lane all attract the attention of professional astronomers.
#science #astronomy
#science #astronomy
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A spiral galaxy is a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, forms part of the Hubble sequence. Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge. These are often surrounded by a much fainter halo of stars, many of which reside in globular clusters. About 77% of the observed galaxies in the universe are spiral galaxies. Our own galaxy, the Milky Way, is a typical spiral galaxy.
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#science #astronomy
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AT THIS POINT, IT'S JUST A MATTER OF LINING THE TWO SPACECRAFTS UP TO COMPLETE THE RENDEZVOUS -- IS THAT #STARTREK ENOUGH FOR YOU?? ᕕ( ᐛ )ᕗ
#ISS #orbitalmechanics #astronomy
#ISS #orbitalmechanics #astronomy
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ISS RENDEZVOUS ORBITAL MECHANICS -- The final step is to perform a second Hohmann Transfer right as the spacecraft surpasses the ISS. That last transfer gets it to 250 miles above the surface, just out in front of the ISS. The pursuer has suddenly become the pursued. THIS IS WHERE THEY LET THE ISS CATCH UP GOING AT 17,500 MPH -- PRETTY AWESOME HUH??
At that point, the astronauts pull a U-turn in space, fire the spacecraft’s engines one last time to slow down and allow the ISS to catch up.
#ISS #orbitalmechanics #astronomy
At that point, the astronauts pull a U-turn in space, fire the spacecraft’s engines one last time to slow down and allow the ISS to catch up.
#ISS #orbitalmechanics #astronomy
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