Cool astronomy photos

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Doctor X
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Re: Cool astronomy photos

Post by Doctor X » Mon Jun 03, 2019 8:15 am

I do not see the connection. . . .

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Witness
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Re: Cool astronomy photos

Post by Witness » Tue Jun 04, 2019 9:34 pm

IAU statement on satellite constellations

Over the past decades, considerable effort has gone into designing, building, and deploying satellites for many important purposes. Recently networks, known as satellite constellations, have been deployed and are planned in ever greater numbers in mainly low-Earth orbits for a variety of purposes, including providing communication services to underserved or remote areas [1]. Until this year, the number of such satellites was below 200, but that number is now increasing rapidly, with plans to deploy potentially tens of thousands of them. In that event, satellite constellations will soon outnumber all previously launched satellites.

The International Astronomical Union (IAU) is concerned about these satellite constellations. The organisation, in general, embraces the principle of a dark and radio-quiet sky as not only essential to advancing our understanding of the Universe of which we are a part, but also as a resource for all humanity and for the protection of nocturnal wildlife. We do not yet understand the impact of thousands of these visible satellites scattered across the night sky and despite their good intentions, these satellite constellations may threaten both.

The scientific concerns are twofold. Firstly, the surfaces of these satellites are often made of highly reflective metal, and reflections from the Sun in the hours after sunset and before sunrise make them appear as slow-moving dots in the night sky. Although most of these reflections may be so faint that they are hard to pick out with the naked eye, they can be detrimental to the sensitive capabilities of large ground-based astronomical telescopes [2], including the extreme wide-angle survey telescopes currently under construction [3]. Secondly, despite notable efforts to avoid interfering with radio astronomy frequencies, aggregate radio signals emitted from the satellite constellations can still threaten astronomical observations at radio wavelengths. Recent advances in radio astronomy, such as producing the first image of a black hole or understanding more about the formation of planetary systems, were only possible through concerted efforts in safeguarding the radio sky from interference.

The IAU is a science and technology organisation, stimulating and safeguarding advances in those areas. Although significant effort has been put into mitigating the problems with the different satellite constellations, we strongly recommend that all stakeholders in this new and largely unregulated frontier of space utilisation work collaboratively to their mutual advantage. Satellite constellations can pose a significant or debilitating threat to important existing and future astronomical infrastructures, and we urge their designers and deployers as well as policy-makers to work with the astronomical community in a concerted effort to analyse and understand the impact of satellite constellations. We also urge appropriate agencies to devise a regulatory framework to mitigate or eliminate the detrimental impacts on scientific exploration as soon as practical.
https://www.iau.org/news/announcements/detail/ann19035/

Image
Trails made by Starlink satellites

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Abdul Alhazred
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Re: Cool astronomy photos

Post by Abdul Alhazred » Mon Jun 10, 2019 5:18 pm

Image "If I turn in a sicko, will I get a reward?"

"Yes! A BIG REWARD!" ====> Click here to turn in a sicko
The arc of the moral universe bends towards chaos.
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Bruce
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Re: Cool astronomy photos

Post by Bruce » Mon Jun 10, 2019 10:18 pm

That means something is about to happen.

Something wonderful.



All it takes to ignite Jupiter into a star is a little extra mass from a few bajillion monoliths. But don't worry. The ignition of a star within our solar system won't be enough to blow the atmosphere off our planet. Hell, it wasn't even enough to vaporize HAL from a few million miles away.

Plus, it will make a nice pretty double sunset. :P

Europa is off limits though. I'm looking at you, Elon!
Such potential!

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Witness
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Re: Cool astronomy photos

Post by Witness » Wed Jun 19, 2019 1:28 am

Juno perijove 6, and more (you'll have to click): https://vimeo.com/219993811

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Re: Cool astronomy photos

Post by Witness » Sat Jun 29, 2019 3:42 am

Image

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Re: Cool astronomy photos

Post by Witness » Sat Jun 29, 2019 3:47 am

And these news (NASA gets insatiable):
New NASA Mission Will Fly Titan’s Frigid Skies to Search for Life’s Beginnings

Dragonfly, a nuclear-powered drone, will visit Saturn’s largest moon in the 2030s

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https://www.scientificamerican.com/arti ... eginnings/

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Re: Cool astronomy photos

Post by Anaxagoras » Sat Jun 29, 2019 9:49 am

I'm pretty sure that "life's beginnings" were right here on earth, and not on a moon of Saturn
A fool thinks himself to be wise, but a wise man knows himself to be a fool.
William Shakespeare

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Abdul Alhazred
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Re: Cool astronomy photos

Post by Abdul Alhazred » Sat Jun 29, 2019 12:57 pm

It's not clear to me why they think that, but the idea is the "life's beginnings" period on Earth was similar to today's Titan.
Image "If I turn in a sicko, will I get a reward?"

"Yes! A BIG REWARD!" ====> Click here to turn in a sicko
The arc of the moral universe bends towards chaos.
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Witness
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Re: Cool astronomy photos

Post by Witness » Mon Jul 01, 2019 2:25 pm

Anaxagoras wrote:
Sat Jun 29, 2019 9:49 am
I'm pretty sure that "life's beginnings" were right here on earth, and not on a moon of Saturn
No doubt, but Titan could harbor a different, extraterrestrial biogenesis. Or at least hints about that. The article doesn't say otherwise.

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Re: Cool astronomy photos

Post by Anaxagoras » Tue Jul 09, 2019 1:31 am

A fool thinks himself to be wise, but a wise man knows himself to be a fool.
William Shakespeare

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Doctor X
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Re: Cool astronomy photos

Post by Doctor X » Tue Jul 09, 2019 7:07 am

Anaxagoras wrote:
Sat Jun 29, 2019 9:49 am
I'm pretty sure that "life's beginnings" were right here on earth, and not on a moon of Saturn
Well, Phobos did get stuck in Saturn's orbit rather than end up on Earth. . . .

--J.D.
Mob of the Mean: Free beanie, cattle-prod and Charley Fan Club!
"Doctor X is just treating you the way he treats everyone--as subhuman crap too dumb to breathe in after you breathe out."--Don
DocX: FTW.--sparks
"Doctor X wins again."--Pyrrho
"Never sorry to make a racist Fucktard cry."--His Humble MagNIfIcence
"It was the criticisms of Doc X, actually, that let me see more clearly how far the hypocrisy had gone."--clarsct
"I'd leave it up to Doctor X who has been a benevolent tyrant so far."--Grammatron
"Indeed you are a river to your people.
Shit. That's going to end up in your sig."--Pyrrho
"Try a twelve step program and accept Doctor X as your High Power."--asthmatic camel
"just like Doc X said." --gnome

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Re: Cool astronomy photos

Post by sparks » Wed Jul 10, 2019 2:10 am

Doctor X wrote:
Tue Jul 09, 2019 7:07 am
Anaxagoras wrote:
Sat Jun 29, 2019 9:49 am
I'm pretty sure that "life's beginnings" were right here on earth, and not on a moon of Saturn
Well, Phobos did get stuck in Mars' orbit rather than end up on Earth. . . .

--J.D.
FTFY
You can lead them to knowledge, but you can't make them think.

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Doctor X
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Re: Cool astronomy photos

Post by Doctor X » Wed Jul 10, 2019 8:28 am

Ooops!

Phoebe.

Image

--J.D.
Mob of the Mean: Free beanie, cattle-prod and Charley Fan Club!
"Doctor X is just treating you the way he treats everyone--as subhuman crap too dumb to breathe in after you breathe out."--Don
DocX: FTW.--sparks
"Doctor X wins again."--Pyrrho
"Never sorry to make a racist Fucktard cry."--His Humble MagNIfIcence
"It was the criticisms of Doc X, actually, that let me see more clearly how far the hypocrisy had gone."--clarsct
"I'd leave it up to Doctor X who has been a benevolent tyrant so far."--Grammatron
"Indeed you are a river to your people.
Shit. That's going to end up in your sig."--Pyrrho
"Try a twelve step program and accept Doctor X as your High Power."--asthmatic camel
"just like Doc X said." --gnome

ImageWS CHAMPIONS X4!!!! ImageNBA CHAMPIONS!! Stanley Cup!Image SB CHAMPIONS X6!!!!!! Image

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Re: Cool astronomy photos

Post by sparks » Wed Jul 10, 2019 12:06 pm

Doctor X wrote:
Wed Jul 10, 2019 8:28 am
Ooops!

Phoebe.

--J.D.
BWAHAHAHA. No one spins it like you Doc. (Gram's Mom restraining order goes here) :)
You can lead them to knowledge, but you can't make them think.

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Witness
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Re: Cool astronomy photos

Post by Witness » Wed Jul 10, 2019 11:47 pm

Shadow of the eclipse seen from space:
GOES-17
GOES-16

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Re: Cool astronomy photos

Post by shemp » Thu Jul 11, 2019 2:11 am

This is a FAKE! The moon is FLAT!
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Witness
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Re: Cool astronomy photos

Post by Witness » Mon Jul 15, 2019 2:53 am

Mars panorama (Curiosity):

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Bruce
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Re: Cool astronomy photos

Post by Bruce » Tue Jul 16, 2019 2:22 am

Looks just like Colorado. 8)
Such potential!

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Abdul Alhazred
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Re: Cool astronomy photos

Post by Abdul Alhazred » Fri Jul 19, 2019 11:56 am

Tranquility Base Panorama
https://apod.nasa.gov/apod/ap190719.html

Best viewed as image alone, full screen, and scroll sideways to get it all. :coolspecs:
Image "If I turn in a sicko, will I get a reward?"

"Yes! A BIG REWARD!" ====> Click here to turn in a sicko
The arc of the moral universe bends towards chaos.
People who believe God or History are on their side provide the chaos.