RobinRobin 10672 Posted March 19 Share Posted March 19 3 hours ago, Monkeys Fist said: I was reading a little article about Betelgeuse, the mental red giant star in Orion, where they said they’d had data which indicated it was spinning at 3-4 miles per second. This goes against everything they thought was possible, so they looked again at the data. ( they measure the speed of star rotation based on the fact that light coming from the side which is spinning towards us gets a little boost over the light from the side going away from us, from this they can calculate it’s rotation speed.) It seems that it’s (probably) not spinning that fast ( but it might be), but what skewed the data was the fact that the convection cells on it are just ridiculous. On the Sun, they’re about the size of Texas… On Betelgeuse, they can be as big as the Earth’s orbit around the Sun! The thing is fucking huge, it would go out past Jupiter if it was in our system! And it’s kicking off When this goes boom it’s going to be absolutely spectacular. 1 Link to comment Share on other sites More sharing options...
Christmas Tree 4433 Posted May 10 Author Share Posted May 10 Superb northern lights right now Meant to be one of the best in years. 3 Link to comment Share on other sites More sharing options...
RobinRobin 10672 Posted May 11 Share Posted May 11 Aurora Australis not too shabby either 🙂 3 Link to comment Share on other sites More sharing options...
Christmas Tree 4433 Posted May 11 Author Share Posted May 11 2 hours ago, RobinRobin said: Aurora Australis not too shabby either 🙂 Love the red. Didn’t see any red here personally. The following colours can be seen when the northern lights are in the sky. Green: Green is the most common colour seen from the ground and is produced when charged particles collide with oxygen molecules at altitudes of 100 to 300 km. Pink and dark red: Occasionally, the lower edge of an aurora will have a pink or dark red fringe, which is produced by nitrogen molecules at altitudes of around 100 km. Red: A bit higher in the atmosphere (at altitudes of 300 to 400 km), collisions with oxygenatoms produce red auroras. Blue and purple: Finally, hydrogen and heliummolecules can produce blue and purple auroras, but these colours tend to be difficult for our eyes to see against the night sky. 1 Link to comment Share on other sites More sharing options...
Gemmill 42580 Posted May 11 Share Posted May 11 1 Link to comment Share on other sites More sharing options...
Renton 20413 Posted May 11 Share Posted May 11 6 hours ago, RobinRobin said: Aurora Australis not too shabby either 🙂 Southern lights puffs. Link to comment Share on other sites More sharing options...
RobinRobin 10672 Posted May 11 Share Posted May 11 44 minutes ago, Renton said: Southern lights puffs. Link to comment Share on other sites More sharing options...
Christmas Tree 4433 Posted August 12 Author Share Posted August 12 Big meteor shower tonight if you have clear skies and kids. 12-2 is the prime viewing slot. 1 Link to comment Share on other sites More sharing options...
Alex 34060 Posted August 12 Share Posted August 12 34 minutes ago, Christmas Tree said: Big meteor shower tonight if you have clear skies and kids. Seems like slightly odd criteria 9 Link to comment Share on other sites More sharing options...
Christmas Tree 4433 Posted August 12 Author Share Posted August 12 11 minutes ago, Alex said: Seems like slightly odd criteria No way I’d be up and out at 1am watching the skies if not for the sake of kids. Maybes just getting old. 1 Link to comment Share on other sites More sharing options...
Monkeys Fist 41317 Posted August 12 Share Posted August 12 On 11/05/2024 at 04:05, RobinRobin said: Mount Doom viewed from The Dhire not too shabby either 🙂 2nd Breakfasted YP 1 Link to comment Share on other sites More sharing options...
Tdansmith 2989 Posted August 12 Share Posted August 12 Reservoir of liquid water found deep in Martian rocks ! https://www.bbc.co.uk/news/articles/czxl849j77ko ................And slowly but surely they drew their plans against us. 3 Link to comment Share on other sites More sharing options...
RobinRobin 10672 Posted August 13 Share Posted August 13 7 hours ago, Monkeys Fist said: 2nd Breakfasted YP Dhire? Link to comment Share on other sites More sharing options...
RobinRobin 10672 Posted August 13 Share Posted August 13 5 hours ago, Tdansmith said: Reservoir of liquid water found deep in Martian rocks ! https://www.bbc.co.uk/news/articles/czxl849j77ko ................And slowly but surely they drew their plans against us. 2 Link to comment Share on other sites More sharing options...
Renton 20413 Posted August 13 Share Posted August 13 11 hours ago, Tdansmith said: Reservoir of liquid water found deep in Martian rocks ! https://www.bbc.co.uk/news/articles/czxl849j77ko ................And slowly but surely they drew their plans against us. And then they realised they were buried 10km under the surface. Fuck, this may take a while. 1 Link to comment Share on other sites More sharing options...
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