Astronomy

cross-posted from: https://lemmy.world/post/14585017

Voyager 1 contact restored

Caltech researchers have found evidence of a giant planet tracing a bizarre, highly elongated orbit in the outer solar system. The object, which the researchers have nicknamed Planet Nine, has a mass about 10 times that of Earth and orbits about 20 times farther from the sun on average than does Neptune (which orbits the sun at an average distance of 2.8 billion miles). In fact, it would take this new planet between 10,000 and 20,000 years to make just one full orbit around the sun.

TIL Venus is a mostly featureless white ball in the visible spectrum.

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cross-posted from: https://sh.itjust.works/post/17700325

In a 26 March update, ESA announced that after the very first two mirrors were warmed by just 34 degrees, Euclid’s sight was restored, with the telescope’s optics achieving a 15% gain in sensitivity. The process only took a few minutes, with the mirror being warmed from -147 to -113 degrees. The procedure was so successful that it has given operators the confidence to repeat it every couple of months, if necessary, without much impact on Euclid’s six-year survey.

“We expect ice to cloud the VIS instrument’s vision again in the future,” explained Reiko Nakajima, Euclid VIS instrument scientist. “But it will be simple to repeat this selective decontamination procedure every six to twelve months and with very little cost to science observations or the rest of the mission.”

Hey everyone, just an update to my last post from Sunday night.

The eclipse went off without a hitch -- thankfully, I am not personally capable of interfering with celestial events -- and I have to say, nothing could have ever possibly prepared me for the experience. No photo has ever actually captured what I saw Monday afternoon. I don't think any of them have come close.

Picture of my own attached for total lack of effect.

As I looked down at my camera screen and watched the last light of the crescent Sun disappear from my view, I felt totality occur. The umbra of the Moon swept over me while I looked down, and the world got noticeably chilly. The wind died down. The world was silent for a hiccup. I immediately and excitedly looked up, and I think my brain broke.

Hovering in the sky over Potato World was an black, alien orb, surrounded by a thin ring of brilliant white and pink shimmering fire. It was something straight out of a science fiction movie, and not necessarily a good one, either. It looked so incredibly fake.

It looked downright cartoony.

And it hit me like a ton of bricks. I wept as I stared at it, completely unable to maintain composure. I gawked at how bright the solar corona actually was -- I had completely expected to have to strain to see it. I marveled as I realized I was seeing, with my own two, naked eyes, solar prominences arching over the limb of the Moon. And I just sobbed through the whole experience.

My fiancee, whose interest in this had seemed to be primarily a mix between modest curiosity in a significant natural and cultural event and support for my interest, also cried at seeing it, while her son sat on the ground with his mouth hanging open.

It was both the longest and the shortest 3 minutes of my life. When it was over, I just stood in the field in a daze, periodically pressing my camera's shutter button. In just a few minutes following the end of totality, the field, in which hundreds of people had gathered, was nearly empty. Only a handful of us remained, and most of the others had heavier equipment than my DSLR and tripod.

At the end of the day, I didn't quite get the pictures I wanted. I had hoped to get bracketed exposures during totality, and I had assumed that my camera's settings for that when using the LCD display as digital viewfinder would be the same as when using the optical viewfinder, and they weren't. But I'm not too fussed about it. The pictures still turned out significantly better than I could have hoped for.

I'll be posting the rest of my photos -- including some pictures of Potato World itself -- to my PixelFed account, which can be found here, if anyone's interested: https://pixey.org/i/web/profile/384533916920271164