Galaxies

No. Right now it is only in android 4.0 or above.

local group

It is not known, since we don't know all the planets in the galaxy, but in our solar system Mercury is the hottest planet, since it's closest to the sun. The hottest planet in Milky Way would be some planet closest to the biggest and hottest star there is. that is wrong, venus, due to it's hot surface and acid gases and things like that, make it the hottest planet.

Mercury has no atmosphere, and Venus has a large CO2 high pressure atmosphere, hence Venus is hotter than Mercury!

Yes. As with all the stars you see in the sky, Sirius is part of the Milky Way.

The observable Universe is estimated to have around 1011 (a hundred billion) galaxies. The entire Universe is much bigger than that, but it isn't known how much bigger. Perhaps it is infinite, in which case it might have an infinite number of galaxies.

The nebula forms into a protostar.

The Milky Way is approx 9.5x10^17 Km across. So, divide that by 30 Km/s and you'll get 3.16x10^16 seconds then divide by 60sec/min, divide that by 60min/hour, divide that by 24 hr/day, divide that by 365 day/year and you get about 1 billion years and some change (not including leap years, but when dealing with a number this big, it really doesn't matter does it?)

Hope that answers your question.

One way to increase the number of stars in a galaxy is for the two galaxies to collide.

The time it takes for a cluster galaxy to form would be 13.99 BILLION years....

The universe does not end. It continues far beyond our perception of infinity. You can read more about it in books by Stephen Hawkings.

The universe transcends time and it then becomes actual "travel through time" instead of a beginning and end. The universe, as we little, insignificant humans, is without time. We are withough beginning or end (see basics of the Buddhist faith, or the Sennin, Gyoga or Yamabushi sects of ancient Japan).

Also, some quantum physicists are now thinking they will be able to transcend and actually move through time in the very near "future"!

Hope this helps a little bit!

All stars.

a round galaxy is a spiral galaxy.

Triangles

First of all, it's a spiral galaxy, not an spiral galaxy. Second, a spiral galaxy would have a spiral shape, obviously.

Yes, irregular galaxies are all shapeless. None of them have a distinct shape.

Spiral Galaxies

It depends on the size of the elliptical gallery, but you may be sure that there are many billions of stars in one.

Zeta Reticuli (ζ Ret, ζ Reticuli) is a Binary_starsystem located about 39 Light-year(12 Parsec) away from Earth. It is located in the constellation Reticulum, and is visible to the unaided eye in very dark skies. Because of the southerly location of the system, it is not visible north of the Tropics.

The Galaxy, also call the Milky Way, is made of stars. Other, distant star systems are called galaxies (lower case g) by analogy.

pinwheel

There is a Doppler shift which results from the relative motion of the star in question, either toward or away from us as we observe it.

Some people have difficulty making clean slices of ham. Using spiral cut hams makes it easy to get clean slices.

The third most abundant element in the universe is Oxygen.

A rough guess puts the number at 1 in 13 of all stars on the main sequence are type G stars - similar class to our Sun.

So around 7.5 billion to 30 billion.