Timeline for What would it take for a sky to remain completely violet or purple during the daytime?
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Nov 28, 2021 at 2:26 | history | edited | Adrian Colomitchi | CC BY-SA 4.0 |
cosmetic
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| Nov 28, 2021 at 2:19 | comment | added | Adrian Colomitchi | @chrylis-cautiouslyoptimistic- added the source of the image under the photo. | |
| Nov 28, 2021 at 2:18 | history | edited | Adrian Colomitchi | CC BY-SA 4.0 |
Credit for the violet aurora
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| Nov 27, 2021 at 18:17 | comment | added | chrylis -cautiouslyoptimistic- | Very nice aurora photo. Where'd you get it? | |
| Nov 27, 2021 at 15:10 | comment | added | Adrian Colomitchi | @MikeScott "if the star is that much hotter than our sun, it won’t last long enough for complex life to evolve on its planets" A 1000K increase is not even a fever, much less a terminal illness. 6500k is bang in the middle the F-type main sequence star at 1.2M☉. The formula for the star lifetime-to-red-giant is $10^{10}(M/M☉)^{-2.5}$ years. For 1.2, the value is $6.34Gy$. The age of Sun is $4.6Gy$ and the age of Earth is $4.54Gy$ - both comfortably fit in the $6.34Gy$ limit. | |
| Nov 27, 2021 at 14:11 | comment | added | Mike Scott | But if the star is that much hotter than our sun, it won’t last long enough for complex life to evolve on its planets. Hot stars burn out fast. | |
| Nov 27, 2021 at 8:02 | history | edited | Adrian Colomitchi | CC BY-SA 4.0 |
Added other solutions
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| Nov 27, 2021 at 2:51 | history | edited | Adrian Colomitchi | CC BY-SA 4.0 |
typos
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| Nov 27, 2021 at 0:18 | history | edited | Adrian Colomitchi | CC BY-SA 4.0 |
Extra info and corrections
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| Nov 27, 2021 at 0:10 | history | answered | Adrian Colomitchi | CC BY-SA 4.0 |