Galaxies

For nearby stars, the use the parallax effect - the fact that stars change their apparent position, due to Earth's movement around the Sun. The larger the parallax angle, the closer the star is to Earth.

Simple answer no if the Milky Way did not exist there would be no human race.

We are part of the Milky Way galaxy in the most fundamental ways. We live here. We evolved here. Every element that goes up to make the Earth and you except hydrogen and most of the helium comes from stars that lived and died billions of years ago within the Milky Way. We owe our entire existence to the Milky Way.

It is absolutely probable that life has arisen in far off galaxies. They might even look remarkably like humans although that is very doubtful but still they will not be humans.

About one. Our galaxy is surrounded by several dwarf galaxies, that are extremely close to us.

About one. Our galaxy is surrounded by several dwarf galaxies, that are extremely close to us.

About one. Our galaxy is surrounded by several dwarf galaxies, that are extremely close to us.

About one. Our galaxy is surrounded by several dwarf galaxies, that are extremely close to us.

The angular size of the Crab Nebula can be calculated using the formula θ = 2 * arctan (diameter / (2 * distance)). Substituting the values (10 light years for the diameter and 6300 light years for the distance), the angle subtended by the supernova remnant in the sky is approximately 0.054 degrees.

No. there are, in fact, clusters of galaxies that are revolving around one another as a result of their mutual gravitational influence. Now and then, galaxies in a cluster will collide with one another with some spectacular results (over billions of years). Our galaxy, The Milky Way, is on a collision course with the Andromeda galaxy, but no one alive will be around to watch. Occupants of earth may never know it is happening.

Our galaxy, the Milky Way, would appear as a spiral-shaped structure from a distance, with a central bulge surrounded by long arms of stars, gas, and dust radiating outwards. Depending on the observer's perspective, they might see the galaxy edge-on, face-on, or at an angle, which would affect how they perceive the spiral structure. They would also see the light emitted by billions of stars, creating a beautiful and majestic sight in the vastness of space.

The Big Dipper is also known as the Plough or the Charles's Wain, while the Little Dipper is also known as the Little Bear or Ursa Minor.

Not generally, but galaxies do collide sometimes. In fact, the Andromeda Galaxy will probably collide with the Milky Way in about 3 billion years or so. In the collision, stars are often "flung" from one galaxy to the other, or thrown out of the original galaxy entirely.

Follow the link below to see what happens when galaxies collide!

Scientists know that elliptical galaxies do not contain many young stars because observations have shown that they have mostly older stars with low levels of interstellar gas and dust needed for star formation. This lack of gas and dust suggests that these galaxies have exhausted their supply of materials for forming new stars and are no longer actively forming young stars.

Spiral galaxies tend to have blue colors due to the presence of young, hot stars that emit blue light. Elliptical galaxies, on the other hand, are typically redder in color because they contain older stars that emit more red light. This color contrast is a result of the different star formation histories and compositions of the two types of galaxies.

Elliptical galaxies are massive blobs of stars characterized by their round or ellipsoidal shapes. These galaxies are composed mainly of older stars and have little to no ongoing star formation activity.

The age of an individual star can vary; they were all made at different times and have different life spans. Stars can range from a few million to a several billion years old. The oldest star yet discovered, HE 1523-0901, is an estimated 13.2 billion years old.

Edge-on galaxies are galaxies that are viewed from Earth at an angle where their disk appears edge-on, rather than face-on. This orientation makes it difficult to discern spiral arms or other details in the galaxy's structure. These galaxies are useful for studying the distribution of stars and dust within them.

A galaxy is mostly empty space. We have photographs from the Hubble Space Telescope showing galaxies in collision; it takes hundreds of millions of years because they move fairly slowly. But both galaxies are disrupted and the stars are flung off in long swaths of stars.

No, the Little Dipper is not visible from New Zealand because it is circumpolar and only visible in the northern hemisphere. However, New Zealand does have its own distinctive star patterns visible in the night sky, such as the Southern Cross.

Palomar 1 is located in the Milky Way galaxy's halo, not in the spiral arms. It is a globular cluster, which is a spherical collection of stars orbiting the galactic core.

Yes. It takes a long, long time for one turn, like 200 million years.

Yes. It takes a long, long time for one turn, like 200 million years.

Yes. It takes a long, long time for one turn, like 200 million years.

Yes. It takes a long, long time for one turn, like 200 million years.

All elements were created in the sense that the universe began with The Big Bang. Hydrogen was the first atom to form from the subatomic particles, and the hydrogen coalesced into early stars, which formed the next generation of lighter atoms. All the heavier elements were produced in subsequent generations as new stars formed, lived and died in explosions we now call novas and supernovas.

When seen edge-on, a spiral galaxy appears as a thin, flat disk with a bulging central region. The disk is often darkened by dust lanes along its plane, giving it a more defined edge. The spiral arms are not visible from this perspective.

Astronomers can determine the rotation of a galaxy by measuring the Doppler shift of the light emitted by stars and gas within the galaxy. The rotation speed can be calculated by observing the difference in wavelengths of light from objects moving towards or away from us. This information allows scientists to create maps of how the galaxy's stars and gas are moving.

If a galaxy is moving towards the Earth, its spectrum will be blueshifted. This means that the wavelengths of its emitted light are compressed, resulting in a shift towards the blue end of the spectrum.

Yes, the spiral arms in a galaxy do rotate, but not in the sense that individual stars or gas clouds are physically spinning around a central axis. Instead, they are regions of higher density that move through the galaxy as a wave-like pattern due to gravitational interactions with other objects in the galaxy.

The general hypothesis is that we will all die. Any remaining humans would have to revert back to a primordial existence.

A 1,000 kilometers, is the distance from Washington NY to Chicago.

The Chicxulub extintion asteroid, which wiped out 99% of life on Earth was a mere 10km.

If you were to get stuck inside a wormhole, it is uncertain what would happen as our current understanding of wormholes is largely theoretical. Some theories suggest you may be trapped in a spatial distortion, while others propose you could be stretched infinitely. Regardless, it is crucial to remember that wormholes are purely hypothetical constructs at this point and have not been observed in reality.