Name: What the James Webb Telescope Can Tell Us About the Universe | WSJ
Uploaded: 2022-07-13T15:31:49.000Z
Duration: 4 min 5 s
Description: NASA公開韋伯太空望遠鏡的第一組高清影像学べる英語：

we're looking at the universe's oldest and most distant

Galaxies in more detail than ever before.

Nasa on Tuesday released the first set of full color images captured with the

More than six months after it was launched into orbit College lift off from a

tropical rainforest to the edge of time itself,

James Webb begins a voyage back to the birth of the universe.

These first images that Nasa has given us really are meant to

demonstrate webs incredible capabilities in terms of scientific

But how did web capture these first of their kind images?

And what could they tell us about the universe and life beyond our planet

The James Webb Space Telescope is 100 times more powerful than its predecessor.

which has been orbiting earth and taking pictures of distant stars for over 30

Much of Webb's power comes from its massive primary mirror,

giving it more than six times the light collecting area.

That Hubble has a telescope sensitivity basically how much detail it can see

depends on the size of the mirror area because the more light telescopes

American collect the more able it is to see objects in finer detail that are

Web is situated about one million miles away from Earth where it can get a clear view of

It also has a sun shield that protects it from external sources of light and heat like the

because Web is operating much farther from Earth than Hubble is.

Web ultimately does have higher observing efficiency.

Many telescopes are designed to primarily capture visible light,

which represents only a sliver of the spectrum of light emitted by stars and other

Web captures a range of infrared light that is invisible to the human eye but makes

up much of the light that comes our way from the universe.

We're looking at some of the sort of faintest stars,

earliest stars and earliest Galaxies in unprecedented detail and will

also help us probe these planets outside of our solar system known as exoplanets.

Scientists can study these exoplanets by measuring the intensity of light at different

wavelengths and turning it into a graphical representation like this.

That's really what enables us hopefully to sort of peek into the atmospheres of these

exoplanets and ultimately maybe find one with a similar atmosphere to ours.

Scientists are specifically interested in the presence of water or methane because

those could indicate there was or is life on those exoplanets?

One of WebB's main scientific objectives really used to help us look

for signs of life on other planets outside our solar system.

Deep field observation captured by Web will also help scientists study the

development of celestial objects in the universe over time.

They help us resolve the details of fainter objects like stars and

Galaxies that were born much closer to the Big Bang than some of the

Hubble has taken more than 1.5 million photos and helped extend our understanding of

While the web mission is expected to continue for 20 years,

scientists are hopeful it will provide new insights about the formation of stars,

planets and perhaps the presence of life.

has really captured the public's attention and imagination and I feel like people are

really rooting for this telescope and what it can tell us.