939 reputation
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location Spain
age 25
visits member for 4 months
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1d
reviewed No Action Needed Spotting the International Space Station (ISS)
1d
reviewed No Action Needed Earth's gravitational pull on ISS
1d
answered By putting a mirror in space, would we be able to see into the past?
1d
reviewed No Action Needed Is the location that published calendars use to calculate the seasons one specific location on the earth?
1d
answered Spotting the International Space Station (ISS)
1d
reviewed Leave Open Requesting book references for a non-expert person with math background or just a non-expert person
Sep
17
comment Did cosmological inflation occur at speeds greater than $c$?
I think that is a common misconception, it wasn't an opacity wall (like the surface of a bubble), the whole universe was opaque and became transparent leading to the CMB we see today everywhere we look.
Sep
17
comment Did cosmological inflation occur at speeds greater than $c$?
As far as I know CMB isn't at 13.7 Bly from us, it's actually everywhere in the universe, but dramatically redshifted to 2.73K microwaves.
Sep
15
reviewed Leave Open Birthdate differences calculation relative to earths orbit duration
Sep
15
reviewed Leave Open Going from the second moments of an object to its ellipticities and half-light-radius
Sep
15
reviewed Leave Open Estimating the tangential and cross component of the galaxy's shear using Gnomonic projection
Sep
15
reviewed Close Infinite number of universes? Black holes are guilty?
Sep
15
reviewed Close Why are explosions always used to represent the Big Bang?
Sep
12
comment the metal distribution in our solar system
@dim23 Also the Sun will never run out of H or He. The Sun's life states change when the mass of materials in the core that result from fusion is high enough to collapse, increasing temperatures that allow heavier elements fusion.
Sep
11
answered How do I find the RA of sunset and sunrise in a specific location?
Sep
10
answered any unique phenomenon when the cores of two planets are aligned with their star's core?
Aug
29
comment What is the relative time difference between us and a star system in outer layer of our galaxy?
I think he refers to time dilation. Some kind of extreme twin paradox: what if we left one of two twins on the Earth and the other one on a planet at outskirts of the Milky Way. I guess he is asking something like which would be the aging rate difference.
Aug
27
reviewed No Action Needed Time after sunset until star can be seen
Aug
27
comment Why do some celestial bodies have atmospheres, and not others?
You are right @LocalFluff , that plot gives some important clues but it seems no to be 100% reliable. As you say in the plot Titan is supposed to only be able to hold Xenon (Xe), Carbon dioxide (CO2) and Oxygen (O2) but it's actually full of Nitrogen (N2) and Methane (CH4) which seems impossible in that plot.
Aug
27
revised Why do some celestial bodies have atmospheres, and not others?
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