‘Webb is a time machine’: Canadian astronomer looking forward to new research


This week, people across the globe were in awe as they received the first images from the James Webb Space Telescope, capturing the deepest view of the cosmos to date.

It was a particularly special moment for astronomers.

Mircin Sawicki is a professor of astronomy at Saint Mary’s University in Halifax. He’s also a Canadian researcher with the Webb telescope team.

Read more:

Cosmic cliffs, dancing galaxies: James Webb Telescope’s 1st photos dazzle

Seeing the images released by NASA on Tuesday was a long-awaited moment, he said. It did not disappoint.

“They’re beautiful,” said Sawicki. “They’re better than what we expected.”

13


This image provided by NASA on Monday, July 11, 2022, shows galaxy cluster SMACS 0723, captured by the James Webb Space Telescope. The telescope is designed to peer back so far that scientists can get a glimpse of the dawn of the universe about 13.7 billion years ago and zoom in on closer cosmic objects, even our own solar system, with sharper focus. (NASA/ESA/CSA via AP).


23


Stephan’s Quintet, a visual grouping of five galaxies, is best known for being prominently featured in the holiday classic film, “It’s a Wonderful Life.” .


Courtesy / NASA

33


This image released by NASA on Tuesday, July 12, 2022, shows the edge of a nearby, young, star-forming region NGC 3324, in the Carina Nebula. Captured in infrared light by the Near-Infrared Camera (NIRCam) on the James Webb Space Telescope, this image reveals previously obscured areas of star birth, according to NASA. THE CANADIAN PRESS /AP-NASA, ESA, CSA, and STScI via AP.


The images include a view of a giant gaseous planet outside our solar system, two images of a nebula where stars are born and die in spectacular beauty, and an update of a classic image of five tightly clustered galaxies that dance around each other.

Story continues below advertisement

Sawicki is on a team that ensured the Webb could capture these images.

“I’ve been on the so-called ‘instrument science team’ for one of the instruments on Webb that is made in Canada,” he said.

The team began its work more than 20 years ago.

“It’s very gratifying to see it be there, to see it work, to see it operate.”


Mircin Sawicki is a Canadian astronomer who has been working on a team for the James Webb Space Telescope since the early 2000s.


Alicia Draus / Global News

Sawicki said it started off small, but has since grown to more than 20 people, including post-doctorate and graduate students.

Read more:

The Webb telescope also took pictures of Jupiter. Here’s why you probably missed them

The photos released this week were just a “preview” for researchers, said Sawicki. The main data will start coming out in October.

Story continues below advertisement

‘The story of our origins’

There are two main objectives in this research. The first is to find the most distance galaxies in the universe.

“These are the first galaxies that are formed after the Big Bang, and see them as they are being assembled, as they are forming.”

About 13 billion year ago, soon after the Big Bang, researchers theorized the first galaxies were formed.

The Webb telescope was built to discover these, said Sawicki.

Read more:

Jupiter bulked up by cannibalizing baby planets, scientists find

Another goal of the research team is to follow these galaxies over cosmic time, and see how they became what they are today.

“Webb is a time machine… all telescopes are a time machine in a way,” he said.

“Light travels very fast, but it travels at a finite speed. When you look at the moon, you don’t see the moon as it is now, but as it was a second ago.”

The closest star to Earth outside of the solar system is four light years away, said Sawicki, so when we look at it, we see it as it not as it is now, but as it was four years ago.

Story continues below advertisement

“You can look at more distant objects, and those are even further away and it took light longer to get to us. Therefore we see them as they were a long time in the past.”

Those galaxies that were formed 13 billion years ago, emitted their light back then – but it’s just reaching us now.

“We’re seeing their images, their appearance as they were back then,” Sawicki said.

Read more:

Historic 1st all-private astronaut team safely docks to space station

As time goes on, researches will be able to compare images of those galaxies and see how they change over time.

The Canadian researcher’s team has a program to observe five massive galaxy clusters, similar to the ones seen in NASA’s photo.

The group is set to receive more photos and data in October.

Sawicki said it’s exciting.

“This is the story of our origins. This is how we learn about the earliest past of humanity.”

“We were all made in stars, all of the chemical elements in our body were made in distant generations of stars that exploded long ago,” he said.

Story continues below advertisement

“When we look at distant galaxies in these images, we are looking at galaxies that made oxygen and nitrogen and iron, that now exists in abundance in our universe. It’s our history.”

— With files from Alicia Draus and Sarah Do Couto.

© 2022 Global News, a division of Corus Entertainment Inc.



Leave a comment

x
SMM Panel PDF Kitap indir