Supernova so powerful it makes nighttime daylight

[Undesired Walrus]

Hey. See this article:

http://m.mentalfloss.com/article.php?id=70143

If a similar supernova went off close to the earth, what would the sky look like at nighttime and how long would it last? Would appreciate a lot of detail so I can visualise it.

Thanks.


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[Trebuchet]

From the article:

Egyptian physician and astronomer Ali ibn Ridwan wrote that “the sky was shining.” He calculated the supernova’s brightness as three times that of Venus. Observers in Iraq marveled at the star’s “dazzling rays.”

That's nothing like as bright as day. Not even the full moon. Here's a Wiki article on SN1006.

If we really had one that made it as bright as day, you might be able to enjoy it for a second or two, followed by painful death. Gamma rays, etc.

 

[fuelair]

From the article:

That's nothing like as bright as day. Not even the full moon. Here's a Wiki article on SN1006.

If we really had one that made it as bright as day, you might be able to enjoy it for a second or two, followed by painful death. Gamma rays, etc.

Verified and seconded!!!!!

 

[smartcooky]

If it really was three times brighter then Venus when at its brightest (-4.4) then it would have been about mag -5.6, a little more than one magnitude brighter (1 mag - 2.53 times brighter). This is noticeably brighter than Venus..but not dramatically so.

For reference,

Iridium satellites can be as bright as mag -9 (70 times brighter)
The Full Moon is mag -12.6 (1900 times brighter)

 

[Peregrinus]

The SN of 1056 was visible in the daytime for short while; it was noticeably bright in the night sky for two weeks.

 

[Undesired Walrus]

From the article:

That's nothing like as bright as day. Not even the full moon. Here's a Wiki article on SN1006.

If we really had one that made it as bright as day, you might be able to enjoy it for a second or two, followed by painful death. Gamma rays, etc.

Could any natural phenomena create conditions that make the night look like day (without death)?

Or could you have a supernova that created the vague impression of faint twilight?

 

[Jim_MDP]

Could any natural phenomena create conditions that make the night look like day (without death)?

Or could you have a supernova that created the vague impression of faint twilight?

Without the "death" part? Doubt it.
Astronomical phenomenon are fascinating and beautiful to observe and study... but we really, really don't want any of them in our immediate neighborhood.

I always thought it would be cool if we were in one of the galaxy's globular clusters (we have about 60 of them) so the Milky Way would rise and completely fill the sky. Make amateur astronomy interestingly different too.

But I don't know how illuminated that would make a night sky.
It would be bright, but not daylight bright.

 

[Undesired Walrus]

Without the "death" part? Doubt it.

Astronomic phenomenon are fascinating and beautiful to observe and study... bet we really, really don't want any of them in our immediate neighborhood.



But I always thought it would be cool if we were in one of the galaxy's globular clusters (we have about 60 of them) so the Milky way would rise and completely fill the sky. Make amateur astronomy interestingly different too.



But I don't know how illuminated that would make a night sky.

It would be bright, but not daylight bright.

What about a huge comet impacting the moon?


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[jaydeehess]

From the article:

That's nothing like as bright as day. Not even the full moon. Here's a Wiki article on SN1006.

If we really had one that made it as bright as day, you might be able to enjoy it for a second or two, followed by painful death. Gamma rays, etc.

That ws my first thought too. My vison of such a thing would be that It would be a confusing time for those on the dark side of the Earth (wrt the SN) as it's light reached us. People on the side facing the SN would die relatively quickly, telecommunications and electrical power systems would fry. People on the other side of the Earth would perhaps get sketchy reports of a calamity and note the loss of communications. The catatrophe would unwind as the Earth revolved, eventually sterilizing the surface of the planet.
If one could get sufficiently underground or otherwise sheilded you could live through it, but what you would emerge to would be an all but dead planet. Perhaps deep sea vent colonies would survive.

 

[Undesired Walrus]

Or this? http://www.dailymail.co.uk/sciencet...cond-sun-Earth-supernova-turns-night-day.html


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[fuelair]

That ws my first thought too. My vison of such a thing would be that It would be a confusing time for those on the dark side of the Earth (wrt the SN) as it's light reached us. People on the side facing the SN would die relatively quickly, telecommunications and electrical power systems would fry. People on the other side of the Earth would perhaps get sketchy reports of a calamity and note the loss of communications. The catatrophe would unwind as the Earth revolved, eventually sterilizing the surface of the planet.
If one could get sufficiently underground or otherwise sheilded you could live through it, but what you would emerge to would be an all but dead planet. Perhaps deep sea vent colonies would survive.

If we had such.

 

[abaddon]

Hey. See this article:

http://m.mentalfloss.com/article.php?id=70143

If a similar supernova went off close to the earth, what would the sky look like at nighttime and how long would it last? Would appreciate a lot of detail so I can visualise it.

Thanks.


Sent from my iPhone using Tapatalk

The question is moot on many levels. There is no star nearby suitable to cause such an effect, and if there were such an event we would all be dead.

 

[Ziggurat]

Without the "death" part? Doubt it.
Astronomical phenomenon are fascinating and beautiful to observe and study... but we really, really don't want any of them in our immediate neighborhood.

I always thought it would be cool if we were in one of the galaxy's globular clusters (we have about 60 of them) so the Milky Way would rise and completely fill the sky. Make amateur astronomy interestingly different too.

But I don't know how illuminated that would make a night sky.
It would be bright, but not daylight bright.

The Milky Way as seen from earth is basically a band of denser stars. It's very noticeable on a clear night far away from any city, but if I'm in a city, I generally can't see it at all. If you were looking down on the Milky Way from above, it would probably be like expanding that brighter band across the sky. That would be very cool, but not even close to daylight, probably not even brighter than a full moon. The galactic core might be pretty cool looking, though.

 

[Ziggurat]

What about a huge comet impacting the moon?

That would be awesome!

It would also be cool to see Deimos collide with Mars (provided you weren't ON Mars). Although I think Deimos might get ripped apart by tidal forces before it impacts. That would be cool to see too.

 

[Oystein]

The fuul moon is not bright enough to turn the sky blue, or any color other than black, unless there is a thin cloud cover that disperses its white light.

Said medieval SN was far dimmer than the moon. Brighter than Venus.
Can you read by the moon light? Not easily.

I picture such a SN like a single white LED on the ceiling of a high room that's juuust bright enough for you to discern words in large print.

 

[Wolrab]

What about a huge comet impacting the moon?


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It happened already because this ancient image documents it.

https://www.iconexperience.com/i_collection/icons/?icon=star_and_crescent

 

[Jim_MDP]

It happened already because this ancient image documents it.

Is that the explanation for that astronomically impossible combination?


By the way... Sweet Jeebus Christ... how the hell did a URL get that long?
(the graphic doesn't display for me... I only saw the addy when I quoted your post... it's a freakin' book length URL)

 

[Wolrab]

Is that the explanation for that astronomically impossible combination?


By the way... Sweet Jeebus Christ... how the hell did a URL get that long?
(the graphic doesn't display for me... I only saw the addy when I quoted your post... it's a freakin' book length URL)

It was a quick google image search. I don't usually try and post images.

 

[macdoc]

Brightest I've seen is the space station in South Africa

Was bright than this ....station on left ...moon on right

at least double the brightness of Venus .....it was an unusual situation as we were very near full dark but the station was still lit by the setting sun ....and damn does it motor along.

If it's full day light ....you've got seconds to live.

 

[Hans]

Here is one speculation image

https://www.google.com/search?q=ima...7AkIMg&biw=1504&bih=703#imgrc=4JD_5rjavSUbiM: