#supernova remnants

[adastra-sf]

Close-up by the Hubble Space Telescope showing Supernova 1987A, which blew up in the Large Magellanic Cloud (our companion galaxy) back in (you guessed it) 1987.

More info: X

Supernova 1987a

NASA’s Marshall Space Flight Center on Flickr

[spacewonder19]

Supernova Remnant the Veil Nebula ©

[without-ado]

Voices from distant stars l Judy Schmidt/NASA/ESA

[calorionsstarchive]

Veil Nebula (East) (NGC 6992)

[aperture-to-the-cosmos]

Sh2-224 / The Rice Hat Nebula

[cosmonautroger]

Supernova Remnant, Cassiopeia A

[tragedytells-tales]

"Come on, old monkey! You're movin' a little bit slow there for an immortal!!"

Baoxu ( Nicknamed SunBird ) be upon y'all, It uses any pronouns ( it/they preferred )

It can't choose a favorite grandparent, almost got dropped as a baby because it burst into flames when it was born, and yearns to be an even better hero than their dad.

Got flashbanged by the mental image of a Spicynoodles fankid after seeing Redson thinking about what his and MK's kids would look like in @kyri45's Shadowpeach Bioparents AU

The panel at the scene of the crime:

Masterlist

[the-maddest-robot]

Photo of Pickering's triangle (also known as Fleming's triangle) and NGC 6979 / NGC 6974 (the more diffused clouds at the top center/left). This is the third part of the Cygnus loop / veil nebula, this part of the supernova remnant is fainter than the previous two parts of the loop I photographed. This explains in part why it was only discovered by in 1904 by Williamina Fleming (whereas the two writer part were discovered in 1784 by William Herschel). Williamina Fleming was a pioneer in stellar classification, she worked with other women at the Harvard college observatory. Their work in star classification resulted in the Henry Draper Catalogue, an extensive (225 300 stars in the first edition) classification of stars with their position and their spectra. Williamina is also credited with the discovery of 59 nebula (including the famous hors head nebula) more than 300 variable stars as well as (with Henry Norris Russell and Edward Charles Pickering) the discovery of white dwarfs (the remnants of dead sun-like stars).

[johnlyngfr]

The Western Veil Nebula

The Veil Nebula is interstellar debris from a very large star that violently exploded as a supernova about 15,000 years ago. This photo captures the leading shockwave as it continues to expand.

Astronomers call this Supernova Remnant the “Cygnus Loop”, because it is generally circular and viewed in the constellation of Cygnus the Swan. It is nearby at only 2,400 light years, and situated right in our own galactic spiral arm, making our image very crowded with nearby stars.

In this photo, we are looking at the outer edge of the Cygnus Loop debris field that appears facing towards the west. Note the colours: red is hydrogen, blue suggests oxygen, and sulfur is green.

A “Supernova” explosion occurs when an older star depletes fuel and begins to falter at generating a strong stellar wind. As the outward-push falters, gravity causes the aging star to catastrophically implode as a supernova. Indeed, the colours of blue and green suggest the presence of heavier elements, oxygen and sulphur, as formed in the core of older stars.

I photographed the Western Veil Nebula from my garden in Strasbourg France on a single night in August 2024. This is an ensemble of 80 photos, where each was a 3 minute exposure (4 hours of Astrophotography).

More information:

[the-wolf-and-moon]

Supernova Remnant CTA 1

[lackaspace]

Messier 1, Also known as the Crab Nebula, a supernova remnant in the constellation of Taurus as seen by the Hubble Space Telescope. (Image Credits go to NASA/ESA)

[spacewonder19]

Supernova Remnant Cassiopeia A ©

[without-ado]

25 new images to celebrate Chandra's 25th anniversary

[of-stars-and-dust]

Astronomy Picture of the Day

2005 April 21

G21.5-0.9: A Supernova's Cosmic Shell

Credit: Heather Matheson & Samar Safi-Harb (Univ. Manitoba), CXC, NASA

Explanation: The picture is lovely, but this pretty cosmic shell was produced by almost unbelievable violence - created when a star with nearly 20 times the mass of the sun blasted away its outer layers in a spectacular supernova explosion. As the expanding debris cloud swept through surrounding interstellar material, shock waves heated the gas causing the supernova remnant to glow in x-rays. In fact, it is possible that all supernova explosions create similar shells, some brighter than others. Cataloged as G21.5-0.9, this shell supernova remnant is relatively faint, requiring about 150 hours of x-ray data from the orbiting Chandra Observatory to create this false-color image. G21.5-0.9 is about 20,000 light-years distant in the constellation Scutum and measures about 30 light-years across. Based on the remnant's size, astronomers estimate that light from the original stellar explosion first reached Earth several thousand years ago.

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)

NASA Official: Jay Norris.

A service of: EUD at NASA / GSFC

& Michigan Tech. U.

[livingforstars]

Rampaging Fronts of the Veil Nebula - March 7th, 1996.

"A supernova explosion of a high-mass star results in fast moving blast waves. At the front of the waves shown above, ionised gas in the Veil Supernova Remnant rushes out from the explosion, sweeps up material, and breaks up many atoms into constituent ions and electrons. Observations with the Hubble Space Telescope in 1993 indicate that the blue shock wave was catapulted away from the stellar explosion after the red shock wave, and had yet to catch up to it in some regions. The Veil supernova remnant's has a very large angular size - six times the diameter of the full Moon - and different parts of it are known as the "Cygnus Loop" and catalog numbers NGC 6960, NGC 6979, NGC 6992, and NGC 6995."

[chibinotan]

Crab Nebula