jalley, to pnw
@jalley@sfba.social avatar

This is today

jalley, to pnw
@jalley@sfba.social avatar

Absolutely incredible display last night #auroraborealis #pnw #wawx #lookup

image/jpeg
image/jpeg

chrisnelsonsdog, to random
@chrisnelsonsdog@mstdn.social avatar
jalley, to pnw
@jalley@sfba.social avatar

A taste of what we're seeing in the San Juan islands tonight

jalley, to pnw
@jalley@sfba.social avatar

Friday afternoon

toolbear,
@toolbear@union.place avatar

@jalley
For some reason this looks like the most phenomenal POVRay rendering I've ever seen.

This could be on the cover of a book with a CD-ROM sleeve glued to the inside back flap with a disc of software for raytracing, viewing TARGA images, and a sampler of public domain images the publisher scraped from an FTP archive.

Astromeg, to Astronomy
@Astromeg@astrodon.social avatar

“What’s that bright #star next to the #moon tonight?!”

It’s no star, that’s the #planet #Jupiter!

If you have access to binoculars, have a look and see if you can spot its four largest moons: Io, Europa, Ganymede and Callisto.

#astronomy #planets #lookup #space #nightsky

Close up showing the Moon in more detail
Close up of Jupiter showing the four largest moons

Astromeg,
@Astromeg@astrodon.social avatar

Images also by Stellarium!

Astromeg, to Astronomy
@Astromeg@astrodon.social avatar

Good morning ! is there too, it you have a clear horizon.
Image by Stellarium.

chrisnelsonsdog, to random
@chrisnelsonsdog@mstdn.social avatar

It's dangerous to go alone, take this perogie.

lacochran, to photography
philo, to Astro
@philo@astronomy.city avatar

The M31 Andromed Galaxy.

Stars removed for effect, perhaps showing the view from outside of our galaxy. 2.5 million light years away, M31 will collide and merge with the Milky Way in about 4.5 billion years.

William Optics 61mm Zenithstar OTA, ZWO183MC camera, Celestron CGEM mount. About 40x4min exposures.

alan,

@philo Boy, that will be fun to watch!

[filed under hyper-optimistic]

jsamclicks, to nature
elizabethtasker, to random
@elizabethtasker@mastodon.online avatar

, my good people! The peak of the meteor shower is tonight & tomorrow!

The Geminids are thought to originate from asteroid Phaethon: a weird beast that emits dust a bit like a comet. These dust bunnies then becomes the meteor shower.

JAXA's DESTINY+ mission is scheduled to launch in 2025 and fly past Phaethon to check it out at close quarters, and find out a bit more about its composition. It's possible dust from such "active asteroids" could have delivered organics to Earth.

elizabethtasker,
@elizabethtasker@mastodon.online avatar

Observations from the Spitzer Space Telescope have recently suggested that Phaethon might be the same type of space rock at CY chondrites: a very rare class of meteorite.

The "Y" in CY stands for "Yamato" mountains in Antarctica where Japanese geologists found the first Antarctica meteorite. Now, teams go out annually to hunt for falls as the icy conditions make these meteorites as pristine as you can get without doing sample return.

elizabethtasker,
@elizabethtasker@mastodon.online avatar

Over on the xBird site, JAXA ISAS researchers discussed the CY chondrite link to Phaethon and the Geminids.

The link is below buuuut I'm going to repost the comments here.

(xBird: https://twitter.com/ISAS_JAXA_EN/status/1734823292069105764)

CY chondrites are a type of carbonaceous chondrites, which are rare among meteorites. CY chondrites are “Yamato” type carbonaceous chondrites, which are rare even amongst that class, and their origin is not precisely known. If the relationship between Phaethon and CY meteorites can be confirmed, it will clarify not only the relationship between comets and carbonaceous chondrite meteorites, but also the origin of both. I am really looking forward to the results from DESTINY+! Usui Tomohiro, Astromaterials Science Research Group Manager
Mid-infrared spectra from the Spitzer Space Telescope has revealed that the target object for the DESTINY+ mission, Phaethon, is composed of a material similar to carbonaceous meteorites known as CY chondrites. The "Y" in CY comes from the Yamato Mountains in Antartica! This mountain range is approximately 300km southwest of Syowa Station, and where geological researchers from the Japanese Antarctic Research Expedition discovered the world's first Antarctica meteorite. CY chondrites are a rare type of chondrite that has undergone alteration due to water in its parent body, and then been heated to a maximum of nearly 800℃, which dehydrates it. Phaethon, like asteroids Ryugu and Bennu, is rich in carbon and organic matter. The thermal history of Phaethon, which is scorched by the Sun to temperatures close to 1000K (723℃), is similar to that of CY chondrites. It has been suggested that the radiant heat from Phaethon's approach to the Sun may produce carbon dioxide and sulphur gas, through the thermal decomposition of carbonates and sulphides, and this may be the cause of dust emissions from Phaethon. On the other hand, other work has suggested Na sublimation or electrostatic levitation is the cause. As the mysteries of Phaethon's dust continue to climb, expectations are high for the DESTINY+ mission! Arai Tomoko, DESTINY+ Principal Investigator, Principal Staff Scientist, Planetary Exploration Research Center, Chiba Institute of Technology

jsamclicks, to nature
jsamclicks, to nature
justinknol, to photography
@justinknol@pixelfed.au avatar
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