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Questions regarding the closest star to Earth, at the centre of the Solar System.

3
votes
I think this is an indirect answer, but the name for this event is solstice. In the strictest definition, the solstice is either of the two times in the year, the summer solstice and the winter so …
answered Jun 7 '16 by zephyr
2
votes
Luminosity is the total energy output of a star per unit time. For example, our own Sun has a luminosity of $3.828\times 10^{26}\ \mathrm{Joules/second}$. Our Sun outputs more energy in a single secon …
answered Mar 22 '18 by zephyr
9
votes
If you're not limited to the visible spectrum, the Sun has more-or-less permanent coronal holes at its poles which are nearly always present (albeit constantly changing in shape and size). These coron …
answered Oct 12 '17 by zephyr
5
votes
The fountain will always line up with the Sun during the equinox. The precession of the Earth's axis will not change this fact. What it will change is exactly when the equinox happens. However, the fo …
answered Mar 21 '17 by zephyr
1
vote
You can go back and reference the paper published on this telescope. Specifically it is Culhane et al. 2007. This paper talks about the overall telescope, however the paper describing the optics is Ko …
answered Dec 6 '16 by zephyr
7
votes
What is the apparent magnitude of the Sun at that distance? Fortunately, there's a formula known as the Distance Modulus which is defined to calculate precisely this information. The equation is …
answered Mar 21 '17 by zephyr
10
votes
The thing you are not taking into account is that our predictions for the future evolution of the Sun are not based on our understanding and observations of the Sun alone. They're based on our underst …
answered Mar 28 '17 by zephyr
9
votes
This is a really hard question to answer as Carl Witthoft alludes to. The main problem is that there is no way you can finagle putting at atmosphere around the Sun and have it extend to the Earth. It …
answered Jan 27 '17 by zephyr
20
votes
I think you've answered your own question. if 1st and 2nd stars generation burned hydrogen to helium and more heavier elements, then should it be like 90% of all universe hydrogen already converte …
answered Jul 31 '18 by zephyr
23
votes
The chance happenstance that Earth happened to be floating along and got captured is minuscule. How did Earth wind up floating through space? There's no established mechanism for terrestrial planets …
answered Sep 27 '16 by zephyr
2
votes
Where can I see - or even download - a fairly high resolution (~0.1 nm) solar spectrum at zero air mass - in other words from space without absorption and other features from the Earth's atmosphere …
answered Aug 24 '16 by zephyr
6
votes
The only potentially valid way to cause a long-lasting eclipse that I can think of is to have your moon orbit at the planet's L1 Lagrange point between the planet and the star (and the moon has to be …
answered Nov 2 '17 by zephyr
11
votes
Yes the Sun has an atmosphere. Disclaimer: I'm not sure if you meant this, but your question implies the Sun is a planet. It, of course, is a star and not a planet. Just wanted to make that clear. W …
answered Sep 1 '17 by zephyr