How far back can telescopes see?

The farthest that Hubble has seen so far is about 10-15 billion light-years away. The farthest area looked at is called the Hubble Deep Field.

When analyzing galaxies where do you find the oldest stars?

The Milky Way’s bulge — a bulbous, 10,000 light-year-wide region of stars and dust popping out of the galaxy’s spiral disc — is thought to contain some of the oldest stars in the galaxy.

How can we tell how old the universe is?

Astronomers estimate the age of the universe in two ways: 1) by looking for the oldest stars; and 2) by measuring the rate of expansion of the universe and extrapolating back to the Big Bang; just as crime detectives can trace the origin of a bullet from the holes in a wall.

How far can a telescope zoom in?

These optical aids sit between an eyepiece and the scope, and will typically double the magnification of the eyepiece. There’s a limit, however, which as a rule is: a telescope can magnify twice its aperture in millimetres, or 50 times the aperture in inches.

How Far Will James Webb see?

How far back will Webb see? Webb will be able to see what the universe looked like around a quarter of a billion years (possibly back to 100 million years) after the Big Bang, when the first stars and galaxies started to form.

Where can you find the oldest stars in the Milky Way?

Milky Way, 19° north of Galactic Centre, closer than the Galactic Bulge. Some of these are among the first stars from reionization (the stellar dawn), ending the Dark Ages about 370 000 years after Big Bang.

Where do you find the oldest star in the Milky Way galaxy?

HD 140283 (or the Methuselah star) is a metal-poor subgiant star about 200 light years away from the Earth in the constellation Libra, near the boundary with Ophiuchus in the Milky Way Galaxy. Its apparent magnitude is 7.205. It is one of the oldest stars known.

How do scientists determine the age of galaxies?

We measure the age of the galaxy by finding its distance from us. Gravitational lensing makes the galaxy brighter, so it can be observed at these immense distances, it isn’t directly used for finding the distance, but without gravitational lensing, the galaxy wouldn’t be visible.

How far away is the Andromeda Galaxy?

2.537 million light yearsAndromeda Galaxy / Distance to Earth
Andromeda is a “close by” or “neighborhood” galaxy; it is generally believed to be about 2.2 million light years away. The distance of Andromeda galaxy from Earth is 2.537 million light years and hence it will take that many years for light to travel to Andromeda galaxy.

How far away is the farthest galaxy ever seen?

The farthest and one of the very earliest galaxies ever seen in the universe appears as a faint red blob in this ultra-deep–field exposure taken with NASA’s Hubble Space Telescope. This is the deepest infrared image taken of the universe. Based on the object’s color, astronomers believe it is 13.2 billion light-years away.

Is this the most distant object ever seen in the universe?

Astronomers have pushed NASA’s Hubble Space Telescope to its limits by finding what is likely to be the most distant object ever seen in the universe. The object’s light traveled 13.2 billion years to reach Hubble, roughly 150 million years longer than the previous record holder.

What do astronomers know about the distribution of galaxies?

With modern instruments, astronomers have measured the velocities and distances of hundreds of thousands of galaxies, and so built up a meaningful picture of the large-scale structure of the universe. In the rest of this section, we describe what we know about the distribution of galaxies, beginning with those that are nearby.

How do astronomers use telescopes to study the universe?

Although many astronomical puzzles can only be solved by comparing images of different wavelengths, telescopes are only designed to detect a particular portion of the electromagnetic spectrum. Astronomers therefore often use images from several different telescopes to study celestial phenomena.