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submitted 4 days ago by Sibbo@sopuli.xyz to c/astronomy@mander.xyz

See also Wikipedia. Apparently this is the first time a candidate for an object like this was discovered.

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The other day, I picked up my first scope, a random brand 700/76mm telescope (like celestron powerseeker 76, just a random German brand) in a charity shop for £19, it needs some tlc and has some screws missing and some screws seem loose and not want to tighten (for example around the grabby things that attach the tube to the tripod).

So I wanted to know where I could get spare parts like screws or pads that hold the tube. Maybe the thread is gone or something. When i tried to search, all i find are eye pieces and things like that, not screws or tube holding pads...

( this is my first telescope so sorry if i don't know correct terms)

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submitted 1 week ago by nemeski@mander.xyz to c/astronomy@mander.xyz

Astronomers have discovered the fastest known star in our galaxy, the Milky Way, orbiting the black hole at its centre. The star, named S301, was detected with the European Southern Observatory’s Very Large Telescope Interferometer (ESO’s VLTI) and reaches speeds of 25 000 km/s as it travels around the four-million-Solar-mass black hole. It comes closer to it than any other observed before, so close that it feels the effects of the black hole’s rotation.

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The mission to save NASA’s sinking Swift Observatory was called off Wednesday, dooming the telescope to a fiery reentry later this year.

NASA and Katalyst Space Technologies announced the news more than a month after the startup’s Link spacecraft rocketed away to the telescope’s rescue.

Katalyst said Link will not attempt to capture Swift and boost it to a higher orbit because of problems with controlling the spacecraft. NASA said this means the telescope will plunge through the atmosphere after more than 20 years of tracking some of the biggest explosions in the universe like gamma ray bursts and exploding stars. Its demise is not expected before October.

NASA paid $30 million to Katalyst in an attempt to raise the telescope to a safer, longer-lasting orbit. Intense solar activity caused it to lose altitude faster than expected. The rescue spacecraft went into an uncontrollable spin a few weeks after its liftoff in early July. While flight controllers managed to slow Link’s tumble, issues continued to plague its pointing and positioning in orbit.

“This is not the outcome we were working toward, but it does not change why this mission was worth attempting,” NASA Administrator Jared Isaacman said in a statement.

As a consolation prize, Katalyst will continue to operate Link in proximity with the telescope to demonstrate capabilities for future rescue operations.

Katalyst CEO Ghonhee Lee said it was an ambitious mission on an aggressive timeline that was thrown together in under a year .

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A telescope has spied the fastest known star in our galaxy, racing around the supermassive black hole at the center of the Milky Way.

The star is zipping around the black hole, reaching speeds of about 15,534 miles per second (25,000 kilometers per second). That’s 100,000 times faster than a commercial plane.

“That star is really, extremely fast,” said astronomer Stefan Gillessen with the Max Planck Institute for Extraterrestrial Physics.

The newly discovered star also orbits the black hole at closer range than scientists have ever seen before, taking just 8.7 years to complete a revolution. It harnesses the black hole’s gravity to fly faster without falling in.

Gillessen and colleagues uncovered the star in data collected by the European Southern Observatory’s Very Large Telescope in Chile’s Atacama Desert. Their findings were published Wednesday in the journal Nature.

There are several hundred stars that closely orbit this giant black hole and are sensitive to its gravity. Scientists have mapped the orbits of around 50 of them. The new star is 10 times closer than the previous record holder, meaning that it also feels the effects of the black hole’s rotation.

There are supermassive black holes lurking in the center of almost every large galaxy. But nothing can escape them — not even light — so it’s notoriously difficult for scientists to figure out what’s going on inside.

Studying stars like this one could help scientists measure those mysterious properties, including how fast the supermassive black hole spins. Advanced telescopes are helping to pinpoint fainter stars that previously eluded detection, so there could be even speedier ones waiting to be found.

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submitted 1 week ago* (last edited 1 week ago) by supersquirrel@lemmy.ca to c/astronomy@mander.xyz

🇺🇦

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submitted 2 weeks ago by nemeski@mander.xyz to c/astronomy@mander.xyz
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Starting soon!

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submitted 2 weeks ago* (last edited 2 weeks ago) by sirico@feddit.uk to c/astronomy@mander.xyz
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submitted 2 weeks ago* (last edited 2 weeks ago) by supersquirrel@sopuli.xyz to c/astronomy@mander.xyz

This represented the first supernova of its type observed without a gamma-ray burst and jet of material.

“The finding shows that the most massive stars die in more ways than astronomers previously thought,” Rastinejad said.

a bit of an odd website maybe? article is good though

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The impact flash might — might — be visible to telescopes on Earth

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submitted 3 weeks ago by nemeski@mander.xyz to c/astronomy@mander.xyz
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submitted 4 weeks ago by nemeski@mander.xyz to c/astronomy@mander.xyz
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submitted 1 month ago by rimu@piefed.social to c/astronomy@mander.xyz

The Royal Observatory Greenwich has narrowed the search for the Astronomy Photographer of the Year. The winners will be announced on September 17.

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submitted 1 month ago by nemeski@mander.xyz to c/astronomy@mander.xyz
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The NASA/ESA Hubble Space Telescope has discovered an extrasolar planet, for the first time using direct visible-light imaging. The strange world is far-flung from its parent star, is surrounded by a colossal belt of gas and dust, and may even have rings more impressive than Saturn's.

Author: ESA/Hubble (M. Kornmesser & L. L. Christensen)

CC BY-SA 4.0

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Unlike most entries in Charles Messier's famous catalog of deep sky objects, M24 is not a bright galaxy, star cluster, or nebula. It's a gap in nearby, obscuring interstellar dust clouds that allows a view of the distant stars in the Sagittarius spiral arm of our Milky Way galaxy. Direct your gaze through this gap with binoculars or a small telescope and you are looking through a window over 300 light-years wide at stars some 10,000 light-years or more from Earth. Sometimes called the Small Sagittarius Star Cloud, M24's luminous stars stretch across this gorgeous interstellar scene. Spanning over four full moons on the sky toward the constellation Sagittarius, the telescopic field of view includes dark markings B92 and B93 near the center of M24, along with other clouds of dust and glowing nebulae toward the center of the Milky Way.

Source

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The Mare Orientale, Latin for Eastern Sea, is one of the most striking large scale lunar features. The youngest of the large lunar impact basins it's very difficult to see from an earthbound perspective. Still, captured on July 7 during a period of favorable tilt, or libration of the lunar nearside, the Eastern Sea can be found at the upper right in this sharp telescopic view. In the image, the large lunar mare is extremely foreshortened and stretches along the Moon's western edge. Formed by the impact of an asteroid over 3 billion years ago and nearly 1000 kilometers across, the impact basin's concentric circular features are ripples in the lunar crust. But they are a little easier to spot in more direct images of the region taken from lunar orbit. So why is the Eastern Sea at the Moon's western edge? The Mare Orientale lunar feature was named before 1961. That's when the convention labeling east and west on lunar maps was reversed.

Source

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NASA's Spitzer Space Telescope has captured stunning infrared views of the famous Andromeda galaxy to reveal insights that were only hinted at in visible light.

This Spitzer's 24-micron mosaic is the sharpest image ever taken of the dust in another spiral galaxy. This is possible because Andromeda is a close neighbor to the Milky Way at a mere 2.5 million light-years away.

The Spitzer multiband imaging photometer's 24-micron detector recorded 11,000 separate snapshots to create this new comprehensive picture. Asymmetrical features are seen in the prominent ring of star formation. The ring appears to be split into two pieces, forming the hole to the lower right. These features may have been caused by interactions with satellite galaxies around Andromeda as they plunge through its disk.

Spitzer also reveals delicate tracings of spiral arms within this ring that reach into the very center of the galaxy. One sees a scattering of stars within Andromeda, but only select stars that are wrapped in envelopes of dust light up at infrared wavelengths.

This is a dramatic contrast to the traditional view at visible wavelengths, which shows the starlight instead of the dust. The center of the galaxy in this view is dominated by a large bulge that overwhelms the inner spirals seen in dust. The dust lanes are faintly visible in places, but only where they can be seen in silhouette against background stars.

The data were taken on August 25, 2004, the one-year anniversary of the launch of the space telescope. The observations have been transformed into this remarkable gift from Spitzer -- the most detailed infrared image of the spectacular galaxy to date.

Author: NASA/JPL-Caltech/K. Gordon (University of Arizona)

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