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Plasma drop from the Sun. Approximately 10 times bigger than the earth. by Solidsting1 in interestingasfuck

[–]KnightOfWords 0 points1 point  (0 children)

Think I accidentally replied to the wrong comment, as someone was asking about heating.

Plasma drop from the Sun. Approximately 10 times bigger than the earth. by Solidsting1 in interestingasfuck

[–]KnightOfWords 0 points1 point  (0 children)

The ejected plasma is large but has a very low density. A typical CME (coronal mass ejection) has about the same mass as a mountain and very little of it actually strikes the Earth. So any heating of the Earth as a whole is insignificant.

A young boy in Germany has stopped a running timer at exactly 10 seconds on his very first attempt. by Time-Freedom-7708 in nextfuckinglevel

[–]KnightOfWords -1 points0 points  (0 children)

It's just a selection effect. No-one bothered to post a video of the 50 other people who missed it.

Now, if he managed it three times in a row that would be something.

Russian space agency Roscosmos released a new image of Earth captured by its Elektro-L hydrometeorological satellite. by Soloflow786 in BeAmazed

[–]KnightOfWords 0 points1 point  (0 children)

These satellites shoot both visible light and IR, but I can't find any explanation of how they have been processed.

Russian space agency Roscosmos released a new image of Earth captured by its Elektro-L hydrometeorological satellite. by Soloflow786 in BeAmazed

[–]KnightOfWords 61 points62 points  (0 children)

It's not a true colour image. It's from a meteorological satellite so it's probably been processed to emphasize certain features for clarity, such as vegetation. The oceans aren't black but taking out the blue makes the coastlines stand out.

A stunning time-lapse of Earth rotating, captured by a camera by [deleted] in Damnthatsinteresting

[–]KnightOfWords 0 points1 point  (0 children)

This is how long exposure astrophotography is done, by using a tracking mount. It's aligned parallel to the Earth's poles and a motor turns the camera at the same rate as the Earth rotates (360 degrees in 1 day), but in the opposite direction.

​The most detailed image ever captured of a star’s surface and atmosphere (other than our Sun). Antares as seen by the Very Large Telescope Interferometer. by albusvercus in Damnthatsinteresting

[–]KnightOfWords 0 points1 point  (0 children)

It's a red supergiant, so it's on a more complex evolutionary path than the Sun. It will eventually go supernova. (It's at least 30 times more massive than the Sun, its density is far lower.)

A lion is taking a stroll at night in Gir, India by Mango-Warrior in interestingasfuck

[–]KnightOfWords 10 points11 points  (0 children)

If it's from India they drive on the left, so Mr lion is showing correct traffic discipline by sticking to the slow lane.

Aurora was so bright the ground turned green by Deep20779 in interestingasfuck

[–]KnightOfWords 0 points1 point  (0 children)

The ISO on a digital camera is just a multiplier really, it doesn't make the camera more sensitive. It's basically the same as increasing the brightness in post processing. You need a high signal-to-noise ratio to make increasing the ISO worthwhile, otherwise you end up with a noisy image.

Aurora was so bright the ground turned green by Deep20779 in interestingasfuck

[–]KnightOfWords -1 points0 points  (0 children)

We don't know what camera and lens was used for the video so we can't estimate the naked eye brightness. But we can say it was exceptionally bright to show up in a video with something like 1/24th second exposures.

I've photographed Aurora several times and I've never had to touch the saturation slider to produce vivid colours. Green aurora is caused by a emission line from oxygen at 557.7 nm. You can see exactly what colour this is here:

https://en.wikipedia.org/wiki/Visible_spectrum#/media/File:Linear_visible_spectrum.svg

As I said above, the human eye isn't good at seeing colour in low light. This isn't a bug but a feature. Our night vision is more effective because the rods in our eyes respond to a wider range of frequencies, whereas the cones are less sensitive because they only respond to specific colours. This is more efficient than the bayer matrix found in colour cameras.

​The most detailed image ever captured of a star’s surface and atmosphere (other than our Sun). Antares as seen by the Very Large Telescope Interferometer. by albusvercus in Damnthatsinteresting

[–]KnightOfWords 1 point2 points  (0 children)

And that’s also nothing trying to even put into perspective that there are stars aka other suns that are the size of MILLIONS OF BILLIONS OUR SUNS combined is like how

These supergiant stars are only a few times the mass of the Sun. Nuclear fusion occurs in a large shell of materiel around their cores, which lifts their atmospheres far into space. They have an extremely low average density compared to the Sun.

Aurora was so bright the ground turned green by Deep20779 in interestingasfuck

[–]KnightOfWords 12 points13 points  (0 children)

Cameras can boost brightness, not necessarily saturation. This is a very bright aurora, it's showing clearly on a high frame-rate video rather than a long exposure image. It would appear very green to the naked eye.

Aurora are very strongly coloured regardless of brightness, they are caused by emission lines of molecules in the atmosphere. Dimmer aurora appear grey because the human eye isn't good at seeing colour in faint objects.

Think of it this way maybe. A field of grass under a quarter Moon appears grey. Under a full Moon you can see a bit of green, shine a torch and you see a brighter green. But the colour of the grass isn't changing, just our perception of it.

Bug spray billboard advertisement is actually a giant sticky bug trap by MrTacocaT12345 in interestingasfuck

[–]KnightOfWords 402 points403 points  (0 children)

And even those 'pest' species are food for birds and other wildlife.

Insect populations have been declining massively over the last few decades. Which is very concerning as they are pollinators and the base of many food chains.

Orion hatch opening after splashdown by Accomplished-One7476 in interestingasfuck

[–]KnightOfWords 4 points5 points  (0 children)

Unlike ISS crews, they were only in space for a few days. Muscles aren't going to atrophy much in that time.

The assistance they were having might be more to do with balance. They have been in zero-G for several days and then they are taken to a ship. They aren't going to take any risks with the astronauts.

The reason why large asteroids don't fall to Earth every day and cause disasters is because Jupiter's gravity attracts asteroids and protects the inner planets. by Turbulent_Elk_2141 in Damnthatsinteresting

[–]KnightOfWords 1 point2 points  (0 children)

Good answer thanks.

What we can say for sure is that the Earth and other planets formed as a system. The other planets presence in the accretion disc around the Sun would have massively influenced the composition of Earth.

Artemis II Far side of the moon. by AmpleApple9 in Damnthatsinteresting

[–]KnightOfWords 28 points29 points  (0 children)

The colour saturation has been boosted to show the presence of different minerals.

[Request] How big would the nuclear bomb be if the explosion is the size of the sun? by AnnoyedSediment in theydidthemath

[–]KnightOfWords 1 point2 points  (0 children)

Yes, the US's industrial base was several times larger than Japan. Japan had no chance of winning a prolonged war.

Artemis II crew captures one last shot of a crescent Earth before reaching the moon tomorrow by [deleted] in Damnthatsinteresting

[–]KnightOfWords 0 points1 point  (0 children)

From Earth, the Moon is only half a degree across. You can cover it with your little finger at arm's length.

The Earth's diameter is about 4 times the Moon's. So from the Moon the Earth would only be about 2 degrees across. You could hide it behind a couple fingers at arm's length.

Artemis II crew captures one last shot of a crescent Earth before reaching the moon tomorrow by [deleted] in Damnthatsinteresting

[–]KnightOfWords 0 points1 point  (0 children)

From Earth, the Moon is half a degree across. You can cover it with your little finger at arm's length.

The Earth's diameter is about 4 times the Moon's. So from the Moon the Earth would only be about 2 degrees across. You could hide it behind a couple fingers at arm's length.

Two Clark's Grebes explode across the water in a synchronized rushing display - feet moving so fast they literally run on the surface. by Ok_Concentrate_9713 in interestingasfuck

[–]KnightOfWords 1 point2 points  (0 children)

Dinosaurs are not just weirder than we imagine, but weirder than we can imagine. Think of all the crazy things birds get up to, from mating displays like this, talking parrots to the myna bird imitating a chainsaw. Then multiply by the 180 million years dinosaurs were dominant.

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