Astronomy General Space Discussion

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Most amazing aurora in Tassie tonight.
 

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Scientists have discovered a second large impact crater dated to 66 mya, the same age as the Chicxulub crater which is impact that is thought to have caused the Dino's to perish. This one is off the coast of Africa and the impacting body was a little smaller than at Chicxulub. The crater has been imaged using 3D seismic data. It's possible they were originally one object that fell apart as it neared Earth.
www.popularmechanics.com

The Dino-Killing Asteroid May Have Actually Been a One-Two Punch

New 3D mapping adds crucial information to our understanding of this ancient event.
www.popularmechanics.com www.popularmechanics.com

This one is for the scholars and looks at the strength of the data suggesting asteroid impacts cause mass extinctions. I can only give a summary because it's mostly behind a paywall though they give you enough to get an idea.

'In summary, of the 18 extinctions, one confirmed impact-induced mass extinction and 3-5 possible impact-enhanced biotic crises can now be considered in terms of any extraterrestrial forcing. This tentative conclusion is only superficially consistent with the simplistic assertion in the recent literature of four ‘mass extinctions’ associated with the four largest impacts, as much substantial evidence is still needed. In fact, well-documented volcanic cataclysms are currently shaping the mainstream neo-catastrophic geology.'

www.sciencedirect.com

The impact catastrophism and Alvarez theory of mass extinctions in a retrospective, perspective and prospective: towards the Phanerozoic impact event stratigraphy

Despite several, sometimes prominent propagators, meteorite impact research had a long period of peripheral status until the 1980s. Since then there h…
www.sciencedirect.com www.sciencedirect.com
 
I only found out on Friday so was a bit late to the party. Tonight might be one of the last nights to see Comet C/2023 A3. Here in Adelaide I could not see it with the naked eye, but I managed to capture it with 20+ second exposures on camera at Brighton Beach.

You need an unobstructed western horizon with minimal cloud, about 15 to 90 minutes after sunset. I read that you can still see it without a camera but with binoculars. This site really helped me:

theskylive.com

Where is Comet C/2023 A3 (Tsuchinshan-ATLAS)? How to Find Comet C/2023 A3 (Tsuchinshan-ATLAS) in the Sky

All most complete and up to date resources needed to find Comet C/2023 A3 (Tsuchinshan-ATLAS) in the sky
theskylive.com theskylive.com
 
Rotayjay said:
I only found out on Friday so was a bit late to the party. Tonight might be one of the last nights to see Comet C/2023 A3. Here in Adelaide I could not see it with the naked eye, but I managed to capture it with 20+ second exposures on camera at Brighton Beach.

You need an unobstructed western horizon with minimal cloud, about 15 to 90 minutes after sunset. I read that you can still see it without a camera but with binoculars. This site really helped me:

theskylive.com

Where is Comet C/2023 A3 (Tsuchinshan-ATLAS)? How to Find Comet C/2023 A3 (Tsuchinshan-ATLAS) in the Sky

All most complete and up to date resources needed to find Comet C/2023 A3 (Tsuchinshan-ATLAS) in the sky
theskylive.com theskylive.com
Click to expand...
My pic from when it was visible in the morning

IMG_5367.jpeg
 
Rotayjay said:
What was the date? Could you see it with the naked eye?
Click to expand...
6th of October at around 4:30am and only visible with my camera on a 20 sec timer. not sure its magnitude ever got enough to see with naked eye. It’s now moving away from us so is probably unlikely to get brighter.
 

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