# Tag Info

## Hot answers tagged solar-system

6

The way not to fall into a black hole is essentially the same as the way not to fall into the Sun. It's no more dangerous than any other body with the same mass, which is typically a few times the Sun's mass. The danger of a passing black hole (or other star) is not that it could swallow us but that it could perturb our orbit, with unpredictable effects on ...

4

When you say "destroy anything in it's path", that's true, but it's also true for a star, even a red-dwarf or white-dwarf star would effectively eat or destroy almost anything in their path. It's also worth mentioning that your scenario is very unlikely. According to this source, stars outnumber black holes 1,000 to 1 in the Milky way and most of those ...

4

The dark matter model that is used to explain the "missing mass" problem relating to our Galactic rotation curve, consists of a pseudo-spherical distribution that is much more extended than the visible stars and gas. Even though this "halo" contains more than ten times the mass of the visible matter, when you work out what it's density should be in the solar ...

3

I think the quick answer to this is no, at least, any solar-system around a Wolf-Rayet or similarly large star wouldn't have time to develop. I would think that large stars have solar-systems cause I see no reason why they wouldn't, but the stars don't last long enough for their solar-systems to develop much. The formation period, including bombardment ...

3

There could well be, since when we had nine planets we were looking for planet X (planet number 10). However, the modern day designation of a planet is: "is massive enough for its own gravity to make it roughly spherical (slight "oblate-ness"), and has "cleared its neighbourhood" of smaller objects around its orbit". Hence, we would more than likely discard ...

3

The Sun orbits in the Galactic potential. The motion is complex; it takes about 230 million years to make a circuit with an orbital speed of around 220 km/s, but at the same time it oscillates up and down with respect to the Galactic plane every $\sim 70$ million years and also wobbles in and out every $\sim 150$ million years (this called epicyclic motion). ...

1

You are at the centre of the Big Bang. It happened here and here and here. In fact everywhere in the universe was the centre of the Big Bang. Think of it this way - if there was somewhere that exists now that wasn't at the centre of the Big Bang then that point existed outside space (a nonsense) or the Big Bang was not the beginning of space (and so not the ...

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