Recent content by Sei
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Graduate How Do Black Holes Affect Time and the Fate of the Universe?
Questions. 1. As protons will eventually decay, will objects made with protons orbiting black holes that are time-dilated remains? 2. What happened at someone's perspective if he/she fell into a super massive black holes? Will he/she be free instantly? (Time dilation) 3. What happens after the...- Sei
- Thread
- Black holes Holes
- Replies: 2
- Forum: Astronomy and Astrophysics
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Undergrad Plausibility of high density rocky planets
Wrong! Mega-Earths are planets with mass comparable to Neptune (+10 Earth masses), while having density higher than Earth! Backup claims: https://en.wikipedia.org/wiki/Mega-Earth...- Sei
- Post #9
- Forum: Astronomy and Astrophysics
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Undergrad Plausibility of high density rocky planets
And do the Mega-Earth!- Sei
- Post #7
- Forum: Astronomy and Astrophysics
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Undergrad Earth rotation different in hemisphere
I'm near the equator. The sun rises approximately in the east and sets approximately in the west. Now it's time to learn. Imagine you're in the middle of a sphere. It's rotating. Both rotating. Have a look around. Both celestial hemispheres rotate in the same direction. It's your look that...- Sei
- Post #9
- Forum: Astronomy and Astrophysics
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Undergrad Directed panspermia mission to Mercury
Well. Now I have one question to ask. "Why would you like to infect Mercury with bacteria if we can make a space station with conditions similar to Earth?" - Just wonder.- Sei
- Post #28
- Forum: Astronomy and Astrophysics
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Undergrad Debunking Interstellar Travel: Separating Fact from Fiction
Maybe a fuel-out ramjet "stops" to scoop more hydrogen and retry it? Don't forget the ramjet is moving, not stopping. I think there's a way to do.- Sei
- Post #24
- Forum: Astronomy and Astrophysics
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Undergrad Plausibility of high density rocky planets
With the mass of 4.35 × 10^27 km, you got a planet the mass of 728.37602286598383507557529147599 Earth masses, 2.32 times the mass of Jupiter. To say, it is impossible for a terrestrial planet to have such high mass. However, white dwarves usually have much more mass than that, at about 0.5...- Sei
- Post #5
- Forum: Astronomy and Astrophysics
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Undergrad Earth rotation different in hemisphere
I think you're meaning this. The sky rotates differently if you look to the other sky hemisphere. It rotates clockwise if you're looking at the northern hemisphere, but it rotates counter-clockwise if you're looking at southern hemisphere.- Sei
- Post #4
- Forum: Astronomy and Astrophysics
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Graduate Can We Create a Magnetic Field on Mars through Moon Formation?
It's a bit possible, if we have two planets colliding each other, which is useless, probably.- Sei
- Post #42
- Forum: Astronomy and Astrophysics
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Graduate Can We Create a Magnetic Field on Mars through Moon Formation?
Just Olympus Mons, unlike Maxwell Montes, which is many mountains. Let's talk about warming the martian cores...?- Sei
- Post #40
- Forum: Astronomy and Astrophysics
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Graduate Can We Create a Magnetic Field on Mars through Moon Formation?
Tharsis Montes. Pretty sure it is a shield volcano. And now we have to warm it up or shield the radiation.- Sei
- Post #38
- Forum: Astronomy and Astrophysics
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Graduate Can We Create a Magnetic Field on Mars through Moon Formation?
Oh yes, the convective outer core is due to the inner core heating it up. Sorry, I forgot. Anyways, the real reason of Martian core not generating magnetosphere is having no outer core for the inner core to interact with? Let's call a planet doctor to help warm this thing up.- Sei
- Post #36
- Forum: Astronomy and Astrophysics
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High School Intergalactic Stars: Are There Single Stars Between Galaxies?
"Solar System History: Theories Mixed" In the early solar system we got hundreds of planetsimals the size of The Moon (Luna) or Mars. They soon interact with each other, fling each other away, collide, gaining speed or crash so hard that they actually destroy each other. Some of the small rogue...- Sei
- Post #17
- Forum: Astronomy and Astrophysics
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Graduate Can We Create a Magnetic Field on Mars through Moon Formation?
Isn't the outer core solely affect the mangetosphere? I thought it was. Mars's core cooled down and no longer convective while Earth's core is.- Sei
- Post #34
- Forum: Astronomy and Astrophysics
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Undergrad Directed panspermia mission to Mercury
"Directed panspermia mission to Mercury" Unlike Mars, Mercury used to be a molten planet, vaporized original water (and even silicates) and killed the unlikely original lifeforms. Additional water and lifeforms from a comet seems plausible, but... Do they survived until today? Anyways, do you...- Sei
- Post #26
- Forum: Astronomy and Astrophysics