Green comet zooming our way, last visited 50,000 years ago | The Business Standard
Skip to main content
  • Latest
  • Economy
    • Banking
    • Stocks
    • Industry
    • Analysis
    • Bazaar
    • RMG
    • Corporates
    • Aviation
  • Videos
    • TBS Today
    • TBS Stories
    • TBS World
    • News of the day
    • TBS Programs
    • Podcast
    • Editor's Pick
  • World+Biz
  • Features
    • Panorama
    • The Big Picture
    • Pursuit
    • Habitat
    • Thoughts
    • Splash
    • Mode
    • Tech
    • Explorer
    • Brands
    • In Focus
    • Book Review
    • Earth
    • Food
    • Luxury
    • Wheels
  • More
    • Sports
    • TBS Graduates
    • Bangladesh
    • Supplement
    • Infograph
    • Archive
    • Gallery
    • Long Read
    • Interviews
    • Offbeat
    • Magazine
    • Climate Change
    • Health
    • Cartoons
  • বাংলা
The Business Standard

Monday
June 09, 2025

Sign In
Subscribe
  • Latest
  • Economy
    • Banking
    • Stocks
    • Industry
    • Analysis
    • Bazaar
    • RMG
    • Corporates
    • Aviation
  • Videos
    • TBS Today
    • TBS Stories
    • TBS World
    • News of the day
    • TBS Programs
    • Podcast
    • Editor's Pick
  • World+Biz
  • Features
    • Panorama
    • The Big Picture
    • Pursuit
    • Habitat
    • Thoughts
    • Splash
    • Mode
    • Tech
    • Explorer
    • Brands
    • In Focus
    • Book Review
    • Earth
    • Food
    • Luxury
    • Wheels
  • More
    • Sports
    • TBS Graduates
    • Bangladesh
    • Supplement
    • Infograph
    • Archive
    • Gallery
    • Long Read
    • Interviews
    • Offbeat
    • Magazine
    • Climate Change
    • Health
    • Cartoons
  • বাংলা
MONDAY, JUNE 09, 2025
Green comet zooming our way, last visited 50,000 years ago

Science

AP/UNB
28 January, 2023, 10:00 am
Last modified: 28 January, 2023, 10:02 am

Related News

  • Huge planet discovered orbiting tiny star puzzles scientists
  • Trump pulls Musk ally's NASA nomination, will announce replacement
  • NASA astronauts Butch and Suni emerge from recovery after long Starliner mission
  • For the stargazers: How 2 planets will form 'smiley face' with moon on 25 April 
  • NASA's oldest active astronaut returns to Earth on 70th birthday

Green comet zooming our way, last visited 50,000 years ago

AP/UNB
28 January, 2023, 10:00 am
Last modified: 28 January, 2023, 10:02 am
Photo: Collected
Photo: Collected

A comet is streaking back our way after 50,000 years.

The dirty snowball last visited during Neanderthal times, according to NASA. It will come within 26 million miles (42 million kilometers) of Earth Wednesday before speeding away again, unlikely to return for millions of years.

So do look up, contrary to the title of the killer-comet movie "Don't Look Up."

The Business Standard Google News Keep updated, follow The Business Standard's Google news channel

Discovered less than a year ago, this harmless green comet already is visible in the northern night sky with binoculars and small telescopes, and possibly the naked eye in the darkest corners of the Northern Hemisphere. It's expected to brighten as it draws closer and rises higher over the horizon through the end of January, best seen in the predawn hours. By 10 Feb, it will be near Mars, a good landmark.

Skygazers in the Southern Hemisphere will have to wait until next month for a glimpse.

While plenty of comets have graced the sky over the past year, "this one seems probably a little bit bigger and therefore a little bit brighter and it's coming a little bit closer to the Earth's orbit," said NASA's comet and asteroid-tracking guru, Paul Chodas.

Green from all the carbon in the gas cloud, or coma, surrounding the nucleus, this long-period comet was discovered last March by astronomers using the Zwicky Transient Facility, a wide field camera at Caltech's Palomar Observatory. That explains its official, cumbersome name: comet C/2022 E3 (ZTF).

On Wednesday, it will hurtle between the orbits of Earth and Mars at a relative speed of 128,500 mph (207,000 kilometers). Its nucleus is thought to be about a mile (1.6 kilometers) across, with its tails extending millions of miles (kilometers).

The comet isn't expected to be nearly as bright as Neowise in 2020, or Hale-Bopp and Hyakutake in the mid to late 1990s.

But "it will be bright by virtue of its close Earth passage ... which allows scientists to do more experiments and the public to be able to see a beautiful comet," University of Hawaii astronomer Karen Meech said in an email.

Scientists are confident in their orbital calculations putting the comet's last swing through the solar system's planetary neighborhood at 50,000 years ago. But they don't know how close it came to Earth or whether it was even visible to the Neanderthals, said Chodas, director of the Center for Near Earth Object Studies at NASA's Jet Propulsion Laboratory in California.

When it returns, though, is tougher to judge.

Every time the comet skirts the sun and planets, their gravitational tugs alter the iceball's path ever so slightly, leading to major course changes over time. Another wild card: jets of dust and gas streaming off the comet as it heats up near the sun.

"We don't really know exactly how much they are pushing this comet around," Chodas said.

The comet — a time capsule from the emerging solar system 4.5 billion years ago — came from what's known as the Oort Cloud well beyond Pluto. This deep-freeze haven for comets is believed to stretch more than one-quarter of the way to the next star.

While comet ZTF originated in our solar system, we can't be sure it will stay there, Chodas said. If it gets booted out of the solar system, it will never return, he added.

Don't fret if you miss it.

"In the comet business, you just wait for the next one because there are dozens of these," Chodas said. "And the next one might be bigger, might be brighter, might be closer."

World+Biz

NASA / Comet / Comet C/2022 E3 (ZTF)

Comments

While most comments will be posted if they are on-topic and not abusive, moderation decisions are subjective. Published comments are readers’ own views and The Business Standard does not endorse any of the readers’ comments.

Top Stories

  • Dhaka North City Corporation Administrator Mohammad Azaz holds a press conference at the DNCC Nagar Bhaban in Gulshan-2 on 9 June 2025. Photo: TBS
    Over 4.66 lakh animals sacrificed in Dhaka North during Eid: Administrator Azaz
  • Photos: Collected
    Abdul Hamid wasn't arrested because he's not wanted right now: Home adviser
  • A surveillance footage shows crew of the Gaza-bound British-flagged yacht "Madleen", put their hands up as strong light came into the vessel, in this screengrab from a video released on June 9, 2025. Freedom Flotilla Coalition/Handout via REUTERS
    Israeli forces seize Gaza aid boat carrying Greta Thunberg

MOST VIEWED

  • File Photo: British MP Tulip Siddiq attends a news conference with Richard Ratcliffe, the husband of jailed British-Iranian aid worker Nazanin Zaghari-Ratcliffe, in London, Britain October 11, 2019. Photo: REUTERS/Peter Nicholls/File Photo
    Tulip requests CA Yunus for a meeting over corruption allegations: Guardian
  • Representational image of Dhaka metro rail. Photo: Mumit M/TBS
    Metro rail takes Eid break today
  • Photo: Reuters
    Trump says Musk relationship over, warns of 'serious consequences' if he funds Democrats
  • Representational image. Photo: Reuters
    Bangladesh reports 3 more Covid-19 cases
  • Muhammad Yunus (L) and Narendra Modi. Photo: Collected
    Modi sends Eid-ul-Adha greetings, Yunus calls for continued bilateral cooperation
  • Photo collage shows political posters in Bagerhat. Photos: Jannatul Naym Pieal
    From Sheikh Dynasty to sibling rivalry: Bagerhat signals a turning tide in local politics

Related News

  • Huge planet discovered orbiting tiny star puzzles scientists
  • Trump pulls Musk ally's NASA nomination, will announce replacement
  • NASA astronauts Butch and Suni emerge from recovery after long Starliner mission
  • For the stargazers: How 2 planets will form 'smiley face' with moon on 25 April 
  • NASA's oldest active astronaut returns to Earth on 70th birthday

Features

File photo of Eid holidaymakers returning to the capital from their country homes/Rajib Dhar

Dhaka: The city we never want to return to, but always do

6h | Features
Photo collage shows political posters in Bagerhat. Photos: Jannatul Naym Pieal

From Sheikh Dynasty to sibling rivalry: Bagerhat signals a turning tide in local politics

2d | Bangladesh
Illustration: TBS

Unbearable weight of the white coat: The mental health crisis in our medical colleges

4d | Panorama
(From left) Sadia Haque, Sylvana Quader Sinha and Tasfia Tasbin. Sketch: TBS

Meet the women driving Bangladesh’s startup revolution

5d | Panorama

More Videos from TBS

CA leaves for London this evening on four-day official tour

CA leaves for London this evening on four-day official tour

1h | TBS Today
Former BGMEA Senior Vice President Abdullah Hill Rakib passes away

Former BGMEA Senior Vice President Abdullah Hill Rakib passes away

2h | Others
What explanation did the Home Affairs Advisor give for not arresting former President Abdul Hamid?

What explanation did the Home Affairs Advisor give for not arresting former President Abdul Hamid?

3h | TBS Today
Former president Abdul Hamid returns to Bangladesh from Thailand

Former president Abdul Hamid returns to Bangladesh from Thailand

4h | TBS Today
EMAIL US
contact@tbsnews.net
FOLLOW US
WHATSAPP
+880 1847416158
The Business Standard
  • About Us
  • Contact us
  • Sitemap
  • Advertisement
  • Privacy Policy
  • Comment Policy
Copyright © 2025
The Business Standard All rights reserved
Technical Partner: RSI Lab

Contact Us

The Business Standard

Main Office -4/A, Eskaton Garden, Dhaka- 1000

Phone: +8801847 416158 - 59

Send Opinion articles to - oped.tbs@gmail.com

For advertisement- sales@tbsnews.net