AVN 65.45 Increased By ▲ 0.50 (0.77%)
BAFL 30.65 Decreased By ▼ -0.86 (-2.73%)
BOP 4.83 Increased By ▲ 0.04 (0.84%)
CNERGY 3.72 Decreased By ▼ -0.12 (-3.13%)
DFML 14.26 Decreased By ▼ -0.15 (-1.04%)
DGKC 41.06 Decreased By ▼ -0.54 (-1.3%)
EPCL 46.56 Decreased By ▼ -0.14 (-0.3%)
FCCL 11.35 Increased By ▲ 0.06 (0.53%)
FFL 5.03 Decreased By ▼ -0.02 (-0.4%)
FLYNG 5.78 Decreased By ▼ -0.04 (-0.69%)
GGL 10.28 Decreased By ▼ -0.17 (-1.63%)
HUBC 67.03 Increased By ▲ 1.39 (2.12%)
HUMNL 5.68 Increased By ▲ 0.02 (0.35%)
KAPCO 27.85 Increased By ▲ 0.10 (0.36%)
KEL 2.19 Increased By ▲ 0.04 (1.86%)
LOTCHEM 24.83 Increased By ▲ 0.48 (1.97%)
MLCF 21.37 Decreased By ▼ -0.11 (-0.51%)
NETSOL 84.20 Decreased By ▼ -0.59 (-0.7%)
OGDC 85.94 Decreased By ▼ -1.31 (-1.5%)
PAEL 11.01 Increased By ▲ 0.03 (0.27%)
PIBTL 4.17 Decreased By ▼ -0.05 (-1.18%)
PPL 74.56 Decreased By ▼ -1.14 (-1.51%)
PRL 13.40 Decreased By ▼ -0.25 (-1.83%)
SILK 0.92 Increased By ▲ 0.03 (3.37%)
SNGP 40.44 Decreased By ▼ -0.89 (-2.15%)
TELE 5.86 Increased By ▲ 0.01 (0.17%)
TPLP 15.42 Decreased By ▼ -0.22 (-1.41%)
TRG 111.63 Decreased By ▼ -0.07 (-0.06%)
UNITY 13.76 Decreased By ▼ -0.22 (-1.57%)
WTL 1.14 Decreased By ▼ -0.02 (-1.72%)
BR100 4,037 Decreased By -26.9 (-0.66%)
BR30 14,412 Decreased By -56.6 (-0.39%)
KSE100 40,471 Decreased By -262.4 (-0.64%)
KSE30 15,163 Decreased By -67.2 (-0.44%)
Follow us

WASHINGTON: The Hubble space telescope has peered back to the dawn of cosmic time and detected light from a star that existed within the first billion years after the Big Bang — a new record, astronomers said Wednesday.

The newly discovered star, called “Earendel,” is so far away its light has taken 12.9 billion years to reach Earth, when the universe was seven percent its current age.

“We almost didn’t believe it at first, it was so much farther than the previous most distant,” said astronomer Brian Welch of Johns Hopkins University in Baltimore, lead author of a paper in Nature describing the discovery. The previous record holder was detected in 2018 when the universe was four billion years old.

Because the universe is expanding, by the time light from distant stars reaches us it is stretched to longer, redder wavelengths, a phenomenon called “redshift.”

Earendel’s light came from an era called redshift 6.2.

“Normally at these distances, entire galaxies look like small smudges, the light from millions of stars blending together,” said Welch in a statement.

The galaxy hosting the star has been naturally magnified and distorted by an effect called gravitational lensing.

This is when a massive object in between the observer and the thing they’re looking at bends the fabric of space-time, so that rays of light coming from the target object that were diverging are bent back towards the observer.

The cosmic magnifying glass in this case is a huge galaxy cluster known as WHL0137-08, which, thanks to a rare alignment, provides maximum magnification and brightening.

“The galaxy hosting this star has been magnified and distorted by gravitational lensing into a long crescent that we named the Sunrise Arc,” said Welch.

After he studied the galaxy in detail, Welch found that one feature is an extremely magnified star that he called Earendel, which means “morning star” in Old English. Earendel existed so long ago that it may not have had the same raw materials as the stars that exist today, added Welch.

“It’s like we’ve been reading a really interesting book, but we started with the second chapter, and now we will have a chance to see how it all got started,” he said.

Astronomers intend to gaze at the star using the James Webb Space Telescope, Hubble’s successor, which is highly sensitive to infrared light from the oldest celestial bodies, in order to confirm Earendel’s age, mass and radius. It has been hypothesized that primordial stars were made solely from the elements forged after the Big Bang: hydrogen, helium and trace amounts of lithium, and should be more massive than stars that exist today.

Comments

Comments are closed.

Hubble telescope spots most distant star ever seen

At least five injured in explosion near Quetta Police Lines

Pakistan expresses unflinching support for Kashmiris on Solidarity Day

China's oil demand bounce may push producers to reconsider output: IEA

Foreign authorities seeking properties/bank accounts info: FBR won’t intimate concerned taxpayer about request

Maryam says PTI chief Imran should be thrown out of politics

Qatar sends envoy to Afghan capital to meet with Taliban

Qatar airport aims to beat passenger record

UK's shortest-serving PM Liz Truss blames economic 'orthodoxy' for downfall

Saudi non-oil private sector activity jumps in January on higher output, orders

India to ban Chinese-linked betting and loan lending apps