Radiomind
@radiomind.bsky.social
Tuned-in to the vibe of the visible universe.
Have Telescope; Will Travel
I'm getting fired-up for the Grand Canyon Star Party June 1-8, 2024. I'll be at the South Rim Visitor Center with my 8" SCT, and the focus will be on springtime globular clusters. Come have a look! 🔭
May 5, 2024 at 1:57 PM
Have Telescope; Will Travel
I'm getting fired-up for the Grand Canyon Star Party June 1-8, 2024. I'll be at the South Rim Visitor Center with my 8" SCT, and the focus will be on springtime globular clusters. Come have a look! 🔭
The Euclid space telescope team has successfully removed an ice deposit on one of the scope's mirrors. A de-icing procedure "performed significantly better than hoped", the ESA said. "After the very first mirror was warmed by just 34 degrees, Euclid's sight was restored." 🔭
Europe space telescope's sight restored after de-icing procedure
The vision of the Euclid space telescope has been restored following a delicate operation that successfully melted a thin layer of ice that had been clouding its sight, the European Space Agency annou...
phys.org
March 27, 2024 at 11:54 AM
The Euclid space telescope team has successfully removed an ice deposit on one of the scope's mirrors. A de-icing procedure "performed significantly better than hoped", the ESA said. "After the very first mirror was warmed by just 34 degrees, Euclid's sight was restored." 🔭
Ice has formed on Euclid's mirrors. Water outgassing from the structure in the vacuum of space has condensed and frozen on the cold optical surfaces.
The ice is the thickness of a DNA strand. Careful heating should remove the ice, and over time, deplete the outgassing.
🔭
www.esa.int/Science_Expl...
The ice is the thickness of a DNA strand. Careful heating should remove the ice, and over time, deplete the outgassing.
🔭
www.esa.int/Science_Expl...
March 21, 2024 at 4:04 PM
Ice has formed on Euclid's mirrors. Water outgassing from the structure in the vacuum of space has condensed and frozen on the cold optical surfaces.
The ice is the thickness of a DNA strand. Careful heating should remove the ice, and over time, deplete the outgassing.
🔭
www.esa.int/Science_Expl...
The ice is the thickness of a DNA strand. Careful heating should remove the ice, and over time, deplete the outgassing.
🔭
www.esa.int/Science_Expl...
A 2.5 million-acre swath of southern Oregon has been named the largest Dark Sky Sanctuary in the world.
Future plans include expanding the sanctuary to 11.4 million acres across two additional counties.
Bortle 1 skies at high elevation are common in Oregon and the skies are not cloudy all night. 🔭
Future plans include expanding the sanctuary to 11.4 million acres across two additional counties.
Bortle 1 skies at high elevation are common in Oregon and the skies are not cloudy all night. 🔭
Oregon Outback is now the largest Dark Sky Sanctuary in the world
A swath of southern Oregon is considered one of the best stargazing spots in the country.
www.oregonlive.com
March 17, 2024 at 1:56 PM
A 2.5 million-acre swath of southern Oregon has been named the largest Dark Sky Sanctuary in the world.
Future plans include expanding the sanctuary to 11.4 million acres across two additional counties.
Bortle 1 skies at high elevation are common in Oregon and the skies are not cloudy all night. 🔭
Future plans include expanding the sanctuary to 11.4 million acres across two additional counties.
Bortle 1 skies at high elevation are common in Oregon and the skies are not cloudy all night. 🔭
It appears that something exploded...
March 13, 2024 at 3:00 AM
It appears that something exploded...
Reposted by Radiomind
The James #Webb Space Telescope has confirmed the accuracy of #Hubble observations that measured the current expansion rate of the universe.
This solidifies a discrepancy between the local expansion rate and conclusions from measurements of the early universe: webbtelescope.pub/3V1pHU7 🔭 🧪
This solidifies a discrepancy between the local expansion rate and conclusions from measurements of the early universe: webbtelescope.pub/3V1pHU7 🔭 🧪
March 11, 2024 at 2:16 PM
The James #Webb Space Telescope has confirmed the accuracy of #Hubble observations that measured the current expansion rate of the universe.
This solidifies a discrepancy between the local expansion rate and conclusions from measurements of the early universe: webbtelescope.pub/3V1pHU7 🔭 🧪
This solidifies a discrepancy between the local expansion rate and conclusions from measurements of the early universe: webbtelescope.pub/3V1pHU7 🔭 🧪
Lunar crater Mendeleev contains a line of smaller craters called "Catena Mendeleev." This is an example of a crater chain created when elements of a single larger object disintegrated before impact due to tidal forces.
March 10, 2024 at 8:59 PM
Lunar crater Mendeleev contains a line of smaller craters called "Catena Mendeleev." This is an example of a crater chain created when elements of a single larger object disintegrated before impact due to tidal forces.
Graze craters of the lunar surface.
Eons after the Moon was created, debris from the Earth and the impactor rained back down on the Moon helping to create the pockmarked surface.
Here is an example of graze craters where meteors impacted at an acute angle, creating a divot in the lunar surface.
Eons after the Moon was created, debris from the Earth and the impactor rained back down on the Moon helping to create the pockmarked surface.
Here is an example of graze craters where meteors impacted at an acute angle, creating a divot in the lunar surface.
March 6, 2024 at 10:18 PM
Graze craters of the lunar surface.
Eons after the Moon was created, debris from the Earth and the impactor rained back down on the Moon helping to create the pockmarked surface.
Here is an example of graze craters where meteors impacted at an acute angle, creating a divot in the lunar surface.
Eons after the Moon was created, debris from the Earth and the impactor rained back down on the Moon helping to create the pockmarked surface.
Here is an example of graze craters where meteors impacted at an acute angle, creating a divot in the lunar surface.
This is Westerlund 2, a compact star cluster with some of the most massive, luminous stars in the galaxy, including numerous O-class stars and runaway Wolf-Rayet stars.
The large number of pre-main sequence stars with masses below 2.5 M☉ suggests the cluster is only 2 million years old.
The large number of pre-main sequence stars with masses below 2.5 M☉ suggests the cluster is only 2 million years old.
March 4, 2024 at 2:53 PM
This is Westerlund 2, a compact star cluster with some of the most massive, luminous stars in the galaxy, including numerous O-class stars and runaway Wolf-Rayet stars.
The large number of pre-main sequence stars with masses below 2.5 M☉ suggests the cluster is only 2 million years old.
The large number of pre-main sequence stars with masses below 2.5 M☉ suggests the cluster is only 2 million years old.
An Astronomer's Notebook.
My wife, an antiquarian, hand made this replica of a third century Nag Hammadi codex using goatskin, papyrus and modern fountain pen paper for the signature (quire). It's the perfect accessory to my new telescope!🔭
March 3, 2024 at 1:01 AM
An Astronomer's Notebook.
My wife, an antiquarian, hand made this replica of a third century Nag Hammadi codex using goatskin, papyrus and modern fountain pen paper for the signature (quire). It's the perfect accessory to my new telescope!🔭
NASA's Galileo spacecraft captured this image of the Jovian ring system while the probe was in the planet's shadow and the planet was backlit by the Sun.
March 2, 2024 at 6:11 PM
NASA's Galileo spacecraft captured this image of the Jovian ring system while the probe was in the planet's shadow and the planet was backlit by the Sun.
This portion of a lunar wrinkle ridge has many boulders gathered on its slopes. These boulders are eroding out of the wrinkle ridge. What is the erosive mechanism? There is no wind or rain on the Moon. Most likely micrometeorites are slowly blasting loose regolith particles revealing the boulders.
February 29, 2024 at 10:49 PM
This portion of a lunar wrinkle ridge has many boulders gathered on its slopes. These boulders are eroding out of the wrinkle ridge. What is the erosive mechanism? There is no wind or rain on the Moon. Most likely micrometeorites are slowly blasting loose regolith particles revealing the boulders.
On Feb. 22, Intuitive Machines’ Nova-C lander, called Odysseus, completed a seven-day journey to lunar orbit and softly landed near crater Malapert A. On Feb. 24, NASA’s Lunar Reconnaissance Orbiter passed over the landing site at an altitude of about 56 miles (90 km) and photographed Odysseus.
February 29, 2024 at 3:50 PM
On Feb. 22, Intuitive Machines’ Nova-C lander, called Odysseus, completed a seven-day journey to lunar orbit and softly landed near crater Malapert A. On Feb. 24, NASA’s Lunar Reconnaissance Orbiter passed over the landing site at an altitude of about 56 miles (90 km) and photographed Odysseus.
"The Pillars of Creation"
This is the Eagle Nebula in the constellation Serpens imaged by the JWST NIRcam infrared camera. In our galaxy about 1-3 new stars are born every year. The largest new stars will live short lives before exploding as core collapse supernovae. Note the red glow of new stars.
This is the Eagle Nebula in the constellation Serpens imaged by the JWST NIRcam infrared camera. In our galaxy about 1-3 new stars are born every year. The largest new stars will live short lives before exploding as core collapse supernovae. Note the red glow of new stars.
February 24, 2024 at 10:22 PM
"The Pillars of Creation"
This is the Eagle Nebula in the constellation Serpens imaged by the JWST NIRcam infrared camera. In our galaxy about 1-3 new stars are born every year. The largest new stars will live short lives before exploding as core collapse supernovae. Note the red glow of new stars.
This is the Eagle Nebula in the constellation Serpens imaged by the JWST NIRcam infrared camera. In our galaxy about 1-3 new stars are born every year. The largest new stars will live short lives before exploding as core collapse supernovae. Note the red glow of new stars.
The Dwingeloo Radio Telescope (DRT), commissioned in 1956, is one of the oldest radio telescopes in the world. Enthusiastic radio amateurs gave the DRT a second life. In 2007 they established the CAMRAS foundation and started to renovate and use the telescope again.
www.camras.nl/en/about-the...
www.camras.nl/en/about-the...
February 22, 2024 at 3:25 PM
The Dwingeloo Radio Telescope (DRT), commissioned in 1956, is one of the oldest radio telescopes in the world. Enthusiastic radio amateurs gave the DRT a second life. In 2007 they established the CAMRAS foundation and started to renovate and use the telescope again.
www.camras.nl/en/about-the...
www.camras.nl/en/about-the...
Reposted by Radiomind
Today’s telescope visit: the Dwingeloo 25 m. 📡🧪🔭 When it was built 1954-1956 it was the largest radio telescope in the world. It’s now a rijksmonument (national heritage site).
It also played a historic role in understanding the structure of the Milky Way galaxy! 🌌
www.camras.nl/en/about-the...
It also played a historic role in understanding the structure of the Milky Way galaxy! 🌌
www.camras.nl/en/about-the...
February 22, 2024 at 2:08 PM
Today’s telescope visit: the Dwingeloo 25 m. 📡🧪🔭 When it was built 1954-1956 it was the largest radio telescope in the world. It’s now a rijksmonument (national heritage site).
It also played a historic role in understanding the structure of the Milky Way galaxy! 🌌
www.camras.nl/en/about-the...
It also played a historic role in understanding the structure of the Milky Way galaxy! 🌌
www.camras.nl/en/about-the...
Uranus' moon Ariel with a surface of water and CO2 ice cross-cut by a system of scarps, canyons, and ridges. The core of the moon is likely rocky and the smoother, seemingly weathered regions are ice remelted by tidal friction. Ariel is the fourth-largest of the 27 known moons of Uranus.
February 21, 2024 at 2:43 PM
Uranus' moon Ariel with a surface of water and CO2 ice cross-cut by a system of scarps, canyons, and ridges. The core of the moon is likely rocky and the smoother, seemingly weathered regions are ice remelted by tidal friction. Ariel is the fourth-largest of the 27 known moons of Uranus.
Miranda is the fifth largest of Uranus’ moons. Miranda’s surface consists of water ice and reveals intense geological activity in the moon’s past. Impacts melt the ice, and then it refreezes without craters.
This tortured moon is criss-crossed by huge ice canyons as deep as 20 kilometers!
February 19, 2024 at 6:39 PM
Miranda is the fifth largest of Uranus’ moons. Miranda’s surface consists of water ice and reveals intense geological activity in the moon’s past. Impacts melt the ice, and then it refreezes without craters.
This tortured moon is criss-crossed by huge ice canyons as deep as 20 kilometers!
"The Aristarchus plateau is one of the most geologically diverse places on the moon: a mysterious raised flat plateau, a giant rille carved by enormous outpourings of lava, fields of explosive volcanic ash, and all surrounded by massive flood basalts." — Mark Robinson, LRO principal investigator.
February 18, 2024 at 2:11 PM
"The Aristarchus plateau is one of the most geologically diverse places on the moon: a mysterious raised flat plateau, a giant rille carved by enormous outpourings of lava, fields of explosive volcanic ash, and all surrounded by massive flood basalts." — Mark Robinson, LRO principal investigator.
“We’ve been chasing this particular galaxy for seven years and spent hours observing it with the two largest telescopes on earth to figure out how old it was. But it was too red and too faint, and we couldn’t measure it." —Karl Glazebrook
The JWST finally imaged this ancient z ~ 11 massive galaxy.
February 15, 2024 at 11:29 PM
“We’ve been chasing this particular galaxy for seven years and spent hours observing it with the two largest telescopes on earth to figure out how old it was. But it was too red and too faint, and we couldn’t measure it." —Karl Glazebrook
The JWST finally imaged this ancient z ~ 11 massive galaxy.
The Sphinx Observatory in Switzerland.
This is what they mean by "Reaching for the stars."
At an elevation of 3,571 m, it is one of the highest observatories in the world. An elevator in a vertical shaft inside the rock serves the facility.
This is what they mean by "Reaching for the stars."
At an elevation of 3,571 m, it is one of the highest observatories in the world. An elevator in a vertical shaft inside the rock serves the facility.
February 13, 2024 at 2:23 PM
The Sphinx Observatory in Switzerland.
This is what they mean by "Reaching for the stars."
At an elevation of 3,571 m, it is one of the highest observatories in the world. An elevator in a vertical shaft inside the rock serves the facility.
This is what they mean by "Reaching for the stars."
At an elevation of 3,571 m, it is one of the highest observatories in the world. An elevator in a vertical shaft inside the rock serves the facility.
"Astronomers, like burglars and jazz musicians, operate best at night."
— Miles Kington
February 12, 2024 at 2:58 PM
"Astronomers, like burglars and jazz musicians, operate best at night."
— Miles Kington
Andrew Pearce, an amateur astronomer in Australia, discovered a nova on the evening of February 9, 2024. He reported his finding to the IAU Central Bureau for Astronomical Telegrams (CBAT).
The nova is located in Scorpio and has a magnitude of about 7.8 at the time of discovery.
The nova is located in Scorpio and has a magnitude of about 7.8 at the time of discovery.
CBAT "Transient Object Followup Reports%quot;
Made an astronomical discovery? Report
it to the International Astronomical Union here!
www.cbat.eps.harvard.edu
February 12, 2024 at 2:39 PM
Andrew Pearce, an amateur astronomer in Australia, discovered a nova on the evening of February 9, 2024. He reported his finding to the IAU Central Bureau for Astronomical Telegrams (CBAT).
The nova is located in Scorpio and has a magnitude of about 7.8 at the time of discovery.
The nova is located in Scorpio and has a magnitude of about 7.8 at the time of discovery.
Here is a mesmerizing image of planetary nebula NGC 2392. When a sun-like star reaches the end of its lifespan, radiation pressure causes material to be ejected into shells. Then the star will collapse into a white dwarf and spend eternity as a dense, cooling ember.
![The image shows a shell of material ejected from a dying star. There is an outer irregular ring of gas and a central structure that looks like bubbles. The dying star is visible in the center.
Credit: NASA, Andrew Fruchter and the ERO Team [Sylvia Baggett (STScI), Richard Hook (ST-ECF), Zoltan Levay (STScI)].](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:m7jbuqtvyd6g4rvoqtedtrz3/bafkreigj3kesk5zitnznaxyvqibsma46iozv75baw7b3njjfhbegq7fxpi@jpeg)
February 10, 2024 at 11:07 AM
Here is a mesmerizing image of planetary nebula NGC 2392. When a sun-like star reaches the end of its lifespan, radiation pressure causes material to be ejected into shells. Then the star will collapse into a white dwarf and spend eternity as a dense, cooling ember.