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1500 questions
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What it the outer part of the sun, that we see with our eyes, called?
When we look at the sun with our eyes it seems much larger than it actually is. When we use a solar filter we are seeing what the sun actually is.
So, what is the name of the thing the solar filter is eliminating? The larger glare part.
And, why…
Beans
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Can a small black hole orbit a large star?
I recently read about the discovery of a tiny black hole (with only three times the mass of the sun) nicknamed ‘The unicorn’ about 1500 light years from earth. This got me thinking, can this black hole orbit around a star? For example, let’s take UY…
Michio Kaku
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How are the solar flares from May 23, 2021 extraordinary?
The Space Weather News for May 23, 2021 reads (with some highlighting by me)
Yesterday, the sun produced a sequence of solar flares unlike anything we've seen in years movie. Earth-orbiting satellites detected a dozen explosions in the magnetic…
B--rian
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Is there anything different about the gravitation around a non-spinning black hole and a neutron star of the same mass?
If we perform a simple experiment by orbiting identical spacecraft around a non-rotating black hole and a non-rotating neutron star of equal mass at a "safe" distance, and ignore differences other than gravitation (e.g. magnetic fields and charge)…
uhoh
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Is the measurement of distance and position of remote celestial bodies accurate?
Considering that light is affected by gravity, how accurate are measurements of distant stars and galaxies?
When light passes through objects with great mass, such as Jupiter size planets, stars, or black holes, shouldn't it change its course and…
Cris
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Are any Pluto-sized objects remaining to be discovered in the Kuiper Belt?
An object approximately the same size as Pluto, Eris, was discovered only 8 years ago (in 2005). Are there any Pluto-sized objects remaining to be discovered, and if so, how far away from the Sun would they have to be to not have been detected…
Guillochon
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Has the Earth's wobble around the Earth-Moon barycenter ever been observed by a spacecraft?
Pluto's motion around the Pluto-Charon barycenter has been imaged by the New Horizons spacecraft:
Has anything like this been imaged of Earth? Yes, the barycenter lies inside of Earth, but it is 3/4th of the distance from the center — more than…
user177107
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Does this photo show the "Little Dipper" and "Big Dipper"?
There are two clusters of stars that I always thought were the Big Dipper and Little Dipper. But after looking at images of the Little Dipper and Big Dipper online, I am not too sure if that's what they are. Also, I found out that the front edge of…
Cave Johnson
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How can many stars be formed from the remains of one supernova?
A supernova is the explosion of a single star; so how is it that thousands of stars can "be born of" that one explosion (presumably only using the unspent fuel / lighter elements of the original)? Does that also mean the stars coming from a…
Still.Tony
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Can two heavy objects circling around their C.M. be separated because of the speed of gravity?
Imagine two massive objects, with the same mass (M) circling around their center of mass (C.M.). Let's assume that the distance between them is 1 light hour. Don´t the two bodies get accelerated and move away from each other because they feel the…
Deschele Schilder
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When did scientists discover that the Sun has a life cycle and that it is going to die?
I have been researching the history of scientific studies about the the Sun. However I have been unable to find out much information about how the scientific consensus started forming around stars' life cycles.
I know that it has been known since…
Andrea
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Looking for a detailed Milky Way map
I am a UI designer working on a sci-fi strategy video game.
I was wondering wether anybody here might be able to help? I am looking for a top down projection of the Milky Way that labels regions of space. This is in order to start building a server…
kiemorar
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Could there be Earth-like planets in binary or trinary systems?
Could Earth-like (suitable for Human habitation) planets exist in systems with 2 or 3 suns, have any been found?
With more than a single star, isn't it likely that the habitation zone would be too irregular, gravitational forces be irregular/strong…
SteB
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Shouldn't tidal locking be impossible for a satellite that has a considerably eccentric orbit?
This popped up into my mind just now. The Moon is tidally locked to Earth, and also has a significantly eccentric orbit. This means that its orbital velocity near periapsis is considerably faster than its orbital velocity at apoapsis.
Thus, for the…
ChristieToWin
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At the Big Bang, when everything was close together, why did it not "collide", violating Planck length or Pauli Exclusion Principle?
How could so much matter, or "all" in fact, have been concentrated in a smaller universe without being in the actual same place? Why did this not result in undercutting the Planck Length or violating the Pauli exclusion principle?
nilshi
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