outergirlsound
Outer Space
✰ Random posts floating around in a vast nothingness ✰ She/Her ✰ AroAce ✰
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the new composite james webb image is so beautiful ive been staring at it for 10 minutes straight
featuring jupiters rings, amalthea (along with a bunch of other moons), the northern and southern auroras, and the great red spot
EDIT: FAQs answered here
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Rectangular log map-scheme of the Observable Universe by Pablo Carlos Budassi
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First image of Uranus and its 5 brightest moons taken by the James Webb Space Telescope.
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Van Gogh's Starry Night with the first image taken by the James Webb telescope by alpgenart (via astronomy_eye)
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i reeeally like planets !!
if i don't get unmotivated, im gonna research a shit ton on our solar system planets!! i really like mercury so far!!
mercury facts ive learned:
☆ one mercurian year is 88 earth days, but one mercurian day is 176- making years faster than days on mercury! this is because of the facts that a. mercury is the closest planet to the sun, and b. it has an extremely slow axis rotation.
☆ mercury has the smallest axis tilt of all the planets in the solar system- the tilt is one thirtieth of a degree, much smaller than jupiter's, which is 3.1 degrees!
☆ "like the moon and venus, mercury exhibits phases as seen from earth. It is "new" at inferior conjunction and "full" at superior conjunction. the planet is rendered invisible from earth on both of these occasions because of its being obscured by the sun, except at its new phase during a transit." [tldr/less sciency: mercury has phases much like the moon- at the "new" and "full" phases, mercury is invisible to earth because it's being completely covered by the sun.]
☆ mercury has no moons! this is because the gravitational pull of the sun pulls any possible moons away from the extremely weaker in comparison force of gravity from mercury, out of orbit, to the sun instead. i'm not sure if these moons are pulled into orbit from the sun or if they are directly vaporized due to the heat, but either way, mercury's possible moons are easily taken.
☆ i hope you enjoyed my mercury facts, i know i did!! ☆
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CAN SPACE EXPAND FASTER THAN LIGHT??"
Blog#346
Saturday, November 4th, 2023
Welcome back,
This is a really good question, and one that a lot of people – including professional astronomers – have a hard time wrapping their head around.
The quick answer is yes, the Universe appears to be expanding faster than the speed of light. By which we mean that if we measure how quickly the most distant galaxies appear to be moving away from us, that recession velocity exceeds the speed of light.
However, it’s not really that simple, because the expansion of the Universe does not have a “speed.” The confusion stems from the fact that we know the Universe is expanding because of measurements of the velocity of galaxies.
When Hubble did this in 1929, he found that almost all galaxies seem to be moving away from us, and that the most distant ones are moving the fastest, a result that has since been confirmed with better data.
To understand why this implies that the Universe is expanding, you can picture the Universe as the surface of a balloon covered in dots.
As the balloon inflates, each dot moves away from every other dot, and the further apart two dots were to begin with, the faster they appear to move away from each other.
However, the dots themselves are not actually moving, it’s the space in between them that gets larger.
Similarly, what we measure as velocity in galaxies is not actually the galaxies moving, it’s the space in between them getting larger. There’s nothing actually traveling faster than light, hence Einstein’s theory of relativity – which tells us nothing can move faster than light – is not being violated.
Originally published on https://askanastronomer.org
COMING UP!!
(Wednesday, November 8th, 2023)
"HOW MANY DIMENSIONS EXIST??"
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This Is Planet WASP 127B, made of almost entirely of the gasses hydrogen and helium Credits: NASA, ESA, ESO, Image by Science Photo Library.
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