Space Exploration - James Webb Telescope / Mars Rovers, etc

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CGI_Ram said:
I was curious why it’s blue in that pic. The article attached to the pic doesn’t describe the surface color.

This article did, and quick explanation is below. Cool article if you are into the planets.

www.universetoday.com

What Color is Mercury?

www.universetoday.com www.universetoday.com

Mercury’s coloring is very similar to the Earth’s moon. In fact, when you’re looking at images of both objects, it’s very difficult to tell the two objects apart. Unlike the Moon, however, Mercury lacks the darker areas, or “seas”, that were created on the Moon by lava flows. Mercury’s color doesn’t have the variety that even the Moon has.

If you got here not asking what color is Mercury the planet, but what color is Mercury (the element), it’s silver, and a liquid at room temperature.
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I wondered the same shit... I know copper produces a blue flame? Wonder if since it gets so hot there this happens alot?
Loyal said:
I don't know where to put this link, but it's way cool! A volcanic eruption seen from space!


View: https://twitter.com/ValaAfshar/status/1559550011335184385?s=20&t=XQ2HUgWyz9JHcZS4f14_4w
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So is that smoke and ash falling off the edge of the Earth that is flat? :thinking:
norcalramfan said:
A Swedish teenager named Greta Thunberg.
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@Tano John Gruden's bastard offspring from Sweden.
 
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www.nasa.gov

NASA’s Webb Takes Star-Filled Portrait of Pillars of Creation - NASA

Download the full-resolution, uncompressed version and supporting visuals from the Space Telescope Science Institute.
www.nasa.gov www.nasa.gov

NASA’s Webb Takes Star-Filled Portrait of Pillars of Creation​

stsci-01gfnn3pwjmy4rqxkz585bc4qh.png
 
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Yeah the before/after is impressive. Here's a map I came across of the galaxy, not sure how accurate it is but it shows us vs the Eagle Nebula which gives an idea where and how far they are looking. The IR spectrum allows them to see through a lot of shit.

1666280963459.png
 
XXXIVwin said:
With all due respect, I think you don't understand the math and physics behind Big Bang Theory very well. I don't claim to understand it that well either... I took a great Freshman Astronomy course in college over 30 years ago, so of course I've forgotten most all of it. But I certainly learned enough to know that many scientists had devoted their lifetimes to understanding this topic, and the "13.8 B age" theory is widely held.

Keep in mind, there is nothing that says "it takes 4.6 B years for a spiral galaxy to develop." All we know is, when we see a spiral galaxy that is 4.6 B light years away, then by definition we are "looking back in time" to see what that galaxy looked like 4.6 B years ago. We do NOT know how long it took for that galaxy to form. We just know that it took 4.6 B years for the light from it to reach us here on earth. So we don't know the "objective" age of a faraway galaxy. By definition, if light from a galaxy took 4.6 B light years to reach us, all we have is a "snapshot" of what that galaxy looked like 4.6 B years ago.

The farthest Hubble could see was stuff 13.2 B light years away. Apparently Webb will be able to see a little farther than that. But again, nothing so far from Webb has challenged the widely held theory of 13.8 B age of universe.

Hope this helps. To the best of my understanding, we have no way of definitively nailing down the "objective" age of galaxies based on Webb observations. We can make educated guesses about how long they took to develop. But by definition, for a galaxy that is "x" number of light years away, we can get a "snapshot" image of what it looked like "x" number of years ago. That's it.
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Also, the galaxies in the images aren’t 13.7B light years away… just like when looking at the night sky, we can see everything from airplanes and satellites to distant stars. No one would mistake a satellite as being as far away as a distant star. There will be later examinations into the deepest space radiation after the oohs and aahs are gone into, but that’ll take both much more time as well as a a need to learn more about what “space” is and a better understanding of the rules which govern the fabric of space-time.

Also, the paradox of the universe is that it’s bigger than light speed allows… meaning that if the universe is 13.8B years old, the absolute diameter shouldn’t exceed 27.6B light years… and yet… the observable universe is 93B light years across…

So… while it seems objects cannot exceed the speed of light, the universe is EXPANDING FASTER than the speed of light and in contravention of our understanding of entropy… it’s ACCELERATING!!!

Also, the universe tastes faintly of raspberries… that’s actually true…
 
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