Galaxies

quasar

Big bang created every thing in 8 Levels.

level 1 to 4 of big bang are lesser than 1 second.

A sun (lower case) is defined as any "star" with planets or other objects revolving around it.

As we have found over 400 exoplanets, the answer is yes, you can see other suns in the night sky.

since earth rotates, the constellations will seem to move across the sky.

If meteorites formed from dust from the early universe, then we would expect them to be very old. Indeed, this is what we find. Scientists have used radiometric dating to measure the ages of meteorites. The results show ages of around 4,500,000,000 years that's seven hundred million years older than the oldest rocks on Earth.

The name is from the Greek root galaxias [γαλαξίας], meaning "milky," a reference to the milky way galaxy.

They referred to it as "milky" because of the faint white appearance on the night sky. It looks like spilled milk. There are a number of ancient legends where milk is involved in its creation.

yes

It would take approximately 100,000 years to travel from one end of the Milky Way to the other at the speed of light, which is about 186,282 miles per second. However, with current technology, it would take much longer to traverse the Milky Way.

The Milky Way Galaxy is about 6 trillion times larger than the rings of Saturn.

Forgetting the newly discovered supersized ring, the "normal" rings have a diameter of about 160,000km.

The diameter of the Milky Way is about 100,000 light years or 9.4605284 × 1017 km.

Divide one by the other and the answer is about 6 trillion (5,912,830,250,000)

Yes

Light and radio waves.

The hottest stars.

Generally, globular clusters contain mainly old stars, population II stars

Any theoretical limit of distance may be travelled if travelling at the speed of light. This is one of the outcomes of relativity. It has been experimentally verified through experiment with radio-active decay where the particle decay was found to be longer under high velocity. It has to do with time dilation. For a person traveling, the reference frame that they measure length in is shortened. It is a necessary consequence needed to keep the speed of light a constant. Technically, the person travelling at the speed of light will manage to cross an infinite distance in zero time. The effect is as if lengths have contracted to zero. The observer measures in accordance to their own clock rates being stationary. The formula distance = rate x time illustrates this well enough. In our example, rate or the velocity of the speed of light is a constant 'C'. Therefore, distance = C x time, or rewritten, C = Distance / Time. The latter incarnation of the basic formula illustrates the ratio of Distance and Time are a fraction and both can be any number so as 'C' remains constant. So an accelerated frame of reference notices distance shrinks, the universe gets smaller and seconds tick slower (covering more distance per second) but the observer cannot notice the change in the rate of time passage due to any attempt to measure it also has to do with another calibrated clock which is also affected. Realistically, accelerating any mass like particle to this velocity is impossible due to it requiring an infinite amount of energy. This is also a consequence of relativity. The inertial energy also approaches infinities. This is why only the photon, a massless particle with a rest mass of zero travels at the speed of light.

At least, this is what the textbooks say!

There is some advanced work in theoretical propulsions using exotics (worm holes, negative mass, space-time folding) that appear also as solutions but remain outside our technological abilities at this time.

Personally, I am convinced that I am travelling at the speed of light with respect to the edge of the universe receding at the speed of light as well as the event horizon of a black hole. I seem to be okay so therefore, it would appear that there is curvature to the universe and these are the boundaries. One may envision a curved 4 dimensional space-time and these points are similar to the curvature of the Earth at the horizon. They are just a point that does not represent an edge. They are curved. But due to our inability to map anything beyond, truth remains in discovery and confirmation.

I strongly suspect the curvature horizon is where time stops for the observer and if time were to be described beyond that point, it would be travelling backward. However, don't expect to get back from this theoretical point as where you came from has shrunk basically out of existence from your hyper travelling joy ride.

The higher gas density forms stars more efficiently, so all the gas is converted into stars before a disk can form.

simply,the difference is that earth is a planet in the solar system and the universe is the entire infinite space containing the solar system,stars, asteroids ,black holes and all that space has to offer.

Venus is the 2nd Planet in Our Solar System.

Our Solar System is in The Solar Neighborhood.

The Solar Neighborhood is in The Orion Arm.

The Orion Arm is on The Milky Way Galaxy.

lightyears

(In English) we call this section of our galaxy the Perseus Arm of the Milky Way Galaxy.

The published opinions of Young-Earth Creationists focus mainly on terrestrial geological events, which they claim to have occurred in an impossibly short period. In the face of scientific evidence to the contrary, they claim that the physical evidence, even the half-lives of radioactive elements, were fundamentally upset by the supposed biblical Flood. As for extra-terrestrial events, most Young-Earth Creationists would not believe that these events really happened or claim that there is an, as yet undiscovered, explanation.

Messier 87 is an elliptical galaxy.

NGC 5866 or the Spindle Galaxy in the constellation Draco is a spiral galaxy thought to be about 50 million light years away.

The background radiation from the big bang

Over time - billions of years - galaxies will merge with other galaxies. In about 3 billion years, the Andromeda galaxy will merge with our own galaxy, the Milky Way.

However, the separation between galaxies is so great, that not all galaxies will merge unless the fundamental issue of the amount of mass in the Universe is determined.

If we live in a "contracting universe" then eventually all galaxies will merge.

A stellar nursery is usually called a molecular cloud. A nebula is a generic term for an interstellar cloud of dust, gas and plasma.

They are associated with the amount of light they give out