Skip to main content

Hubble may have spotted the most distant star to date

By

Astronomers have had success finding some of the most distant galaxies in the universe, but now they might have pinpointed the most distant star to date. As SyFy Wirenotes, researchers using the Hubble Space Telescope have spotted Earendel ("morning star" in Old English), a star currently reckoned to be 12.9 billion light-years away — the light we see from it comes from when the universe was roughly 900 million years old. Until now, the smallest objects seen at that distance were star clusters.

If confirmed, the star will easily smash the previous record. The most distant star before now was MACS J1149+2223 Lensed Star 1, which shone when the universe was about 4 billion years old. Scientists found that star using Hubble in 2018.

Lensed Star Earendel
The ancient star Earendel capured in a composite of exposures from the Hubble Space Telescope.
NASA/ESA/Brian Welch (JHU)/Dan Coe (STScI)/Alyssa Pagan (STScI)

The feat was accomplished using gravitational lensing, or relying on the gravity of galaxy clusters to distort light and magnify objects that would otherwise remain difficult or impossible to detect. The star's host galaxy had its light warped into a long arc thanks to the massive WHL0137-08 galaxy cluster. As Earendel sits on the edge of a space "caustic," or a ripple in the fabric of space, its brightness was magnified a thousand times and helped it stand out.

Earendel is a large beast, too. The scientists estimate it's "at least" 50 times the mass of the Sun, and millions of times brighter. It's also expected to have relatively little metal, as it would have formed when it didn't have access to heavier elements that came with successive star generations. If it's made of only hydrogen and helium, it would be the first evidence of very early "Population III" stars.

The object hasn't been confirmed as a star yet, but that might come relatively soon. Observers plan to use the James Webb Space Telescope's high infrared sensitivity to both verify Earendel's star status and study it in more detail. With that said, Webb might also help pinpoint stars that are even more distant. To put it another way, he technology needed to acknowledge the star's existence might relegate it to a footnote.



from Engadget is a web magazine with obsessive daily coverage of everything new in gadgets and consumer electronics https://ift.tt/hI6xMaS
via IFTTT
Labels:

Comments

Post a Comment

Popular posts from this blog

Instagram accidentally reinstated Pornhub’s banned account

By
After years of on-and-off temporary suspensions, Instagram permanently banned Pornhub’s account in September. Then, for a short period of time this weekend, the account was reinstated. By Tuesday, it was permanently banned again. “This was done in error,” an Instagram spokesperson told TechCrunch. “As we’ve said previously, we permanently disabled this Instagram account for repeatedly violating our policies.” Instagram’s content guidelines prohibit  nudity and sexual solicitation . A Pornhub spokesperson told TechCrunch, though, that they believe the adult streaming platform’s account did not violate any guidelines. Instagram has not commented on the exact reasoning for the ban, or which policies the account violated. It’s worrying from a moderation perspective if a permanently banned Instagram account can accidentally get switched back on. Pornhub told TechCrunch that its account even received a notice from Instagram, stating that its ban had been a mistake (that message itse...
Post a Comment
Read more

Colorado police identified the serial killer who murdered 4 women 40 years ago after exhuming his body to analyze a DNA sample

By
A scientist examines computer images of DNA models. Getty Images Police in Colorado have cracked the cold cases of four women killed 40 years ago. Denver PD said genetic genealogy and DNA analysis helped them identify the serial killer. He had died by suicide in jail in 1981. DNA from his exhumed body matched evidence from the murders. Police in Colorado have cracked the code on four murder cases that went unsolved for 40 years, using DNA from the killer's exhumed body. The cases pertain to four women killed in the Denver metro area between 1978 and 1981. They were 33-year-old Madeleine Furey-Livaudais, 53-year-old Dolores Barajas, 27-year-old Gwendolyn Harris, and 17-year-old Antoinette Parks. The four women were stabbed to death. Denver Police Commander Matt Clark said in a press conference Friday that there was an "underlying sexual component" to the murders but didn't elaborate further. In 2009, a detective reviewed Parks' case and picked several p...
Post a Comment
Read more

If only your bike had a trunk. Oh wait, now it does.

By
Just to let you know, if you buy something featured here, Mashable might earn an affiliate commission. Biking is one of the best ways to get around, especially if you live in a city. It's quick, it's eco-friendly, and you get a bit of exercise.  If you already commute on two wheels or are thinking of starting, there's a storage device you kinda need. SEE ALSO: This bamboo keyboard combo adds a touch of tranquility to your workspace The Buca Boot is a pretty magical two-in-one hybrid: It’s a super secure storage box for your bike that works like the trunk of a car. You can lock your helmet or whatever else in it and leave it safely behind. It’s also a basket—open it up, and you can carry a bouquet of flowers and a baguette like the picturesque cyclist of your dreams.    Read more... More about Storage , Car , Bicycle , Trunk , and Cyclist from Mashable http://ift.tt/2eHNwLB via IFTTT
Post a Comment
Read more