How do scientists accurately measure the distance between galaxies?

How is the distance between galaxies measured? What are the means? Let's take a look!

Looking out the window of a moving vehicle, have you ever noticed that something near you is flying away and something in the distance seems to be moving slowly? This is called the jet lag effect. Similarly, when the earth rotates.

, the position of stars approaching the Earth always moves from one place to another, and distant stars seem to be far away from the Earth. Using this principle, astronomers can more accurately calculate the distance between stars orbiting the Earth. For example, there is a line called ab, which we call the baseline.

The longer the baseline, the farther the measurable distance. Therefore, you can take a picture of the target planet, and after a while, you can take another one and compare the differences between the galaxies in the two photos. The corner where this different line joins together is jet lag.

When looking up at the sky, some stars look much brighter than him. Ancient Greece.

This was noticed by the astronomer Hippoclas, who, in 150 BC, worked to classify the stars by their brightness. This classification of stars according to the brightness of the earth's crust is called temporal magnitude. Today, in order to accommodate the vast amount of astronomical data we have, we have adjusted the scale of Hippoclas, creating a more complex scale.

At this scale, the lower the brightness of the star, the greater its gaze and so on. Some of the apparent magnitudes of stars observed by the Hubble telescope.

It can rise up to 30, and the Sun sees magnitude as.

Galaxies are far away from us, and the distance between galaxies is measured in light-years. off the Milky Way.

The two closest galaxies are the Large Magellanic Cloud and the Small Magellanic Cloud, which are about 170,000 light-years and 200,000 light-years from Earth, respectively. On a cosmic scale, they are at the entrance to the "home" of the Milky Way, the partner galaxies of the Milky Way. The Large Magellanic Cloud and the Small Magellanic Cloud were the first two extragalactic galaxies to be identified.

Trigonometric parallax: It is not easy to measure the distance between celestial bodies. Astronomers classify the objects to be measured into several grades based on the distance.

For objects closer to us, they are no more than 100 light-years away (1 light-year = ?). 1012 km). Astronomers measure their distances using trigonometric parallax.

The trigonometric parallax method is to place the measured object at the apex of a supertriangle. At the ends of the diameter of the Earth's orbit around the Sun are the other two vertices of the triangle. By measuring the angle of view from the Earth to that celestial body, and then measuring the known diameter of the Earth's orbit around the Sun, we can calculate the distance from that object to us based on a triangular formula.

For a distant object, we cannot measure its distance from the Earth using trigonometric parallax because their parallax is no longer accurate on Earth.

It can be measured by laser. The best way to do this is to use lasers, radars, field measurements, and light years, so that you can calculate the distances between galaxies.

Cursor. The distance between galaxies can be obtained through the calculation of two cursors, which is the most accurate and will better know the distance of galaxies.

Summary. I once participated in a galaxy observation event where we used a method called "parallax observation" to measure the distance of the galaxy to us. Parallax observation is a method of measuring the distance of galaxies to us, and it makes use of a phenomenon in astronomy, the parallax of galaxies.

Parallax refers to the change in the position of a galaxy at different viewing angles, and this change can be used to measure the distance of the galaxy to us. By observing the parallax of galaxies, we can calculate the distance of the galaxy to us. Expansion:

In addition, there is a method called the "Supernova Distance Indicator", which can be used to measure the distance of galaxies to us. It takes advantage of the brightness changes of supernovae and can be used to estimate the distance of galaxies to us.

I once participated in a galaxy observation event in which we used a method called "parallax observation" to measure the distance from the star-clear system to our grip. Parallax observation is a method of measuring the distance of galaxies to us, and it makes use of a phenomenon in astronomy, the parallax of galaxies. Parallax refers to the change in the position of a galaxy at different viewing angles, and this change can be used to measure the distance of the galaxy to us.

By observing the parallax of galaxies, we can calculate the distance of the galaxy to us. Extension: In addition, there is a method called the "Supernova Distance Indicator", which can be used to measure the distance of galaxies to us.

It takes advantage of the brightness changes of supernovae and can be used to estimate the distance of galaxies to us.

Can you elaborate on that a little bit more?

Parallax observations in penmum astronomy can be used to measure the distance of galaxies to us. Parallax observation is a method of measuring the distance of stars using the rotation of the Earth, which can provide more accurate distance measurements. In addition, the distance of a galaxy to us can be measured using the optical travel time observation method, which can measure the distance by observing the light travel time variation of the star.