Thursday, August 13, 2020
Home Science & Technology Celestial Object Past Pluto Looks Like A Snowman: NASA

Celestial Object Past Pluto Looks Like A Snowman: NASA

It's neither a comet nor an asteroid, according to Stern, but rather "a primordial planetesimal."

A NASA spacecraft 4 billion miles from Earth yielded its first close-up pictures Wednesday of the most distant celestial object ever explored, depicting what looks like a reddish snowman.

Ultima Thule, as the small, icy object has been dubbed, was found to consist of two fused-together spheres, one of them three times bigger than the other, extending about 21 miles (33 kilometers) in length.

NASA’s New Horizons, the spacecraft that sent back pictures of Pluto 3-plus years ago, swept past the ancient, mysterious object early on New Year’s Day. It is 1 billion miles (1.6 billion kilometers) beyond Pluto.

On Tuesday, based on early, fuzzy images taken the day before, scientists said Ultima Thule resembled a bowling pin. But when better, closer pictures arrived, a new consensus emerged Wednesday.

“The bowling pin is gone. It’s a snowman!” lead scientist Alan Stern informed the world from Johns Hopkins University’s Applied Physics Laboratory , home to Mission Control. The bowling pin image is “so 2018,” joked Stern, who is with the Southwest Research Institute.

NASA, earth
New Horizons project scientist Hal Weaver, of the Johns Hopkins University Applied Physics Laboratory, speaks about new data received from the New Horizons spacecraft during a press conference after the spacecraft completed a flyby of Ultima Thule, Jan. 1, 2019. VOA

The celestial body was nicknamed Ultima Thule — meaning “beyond the known world” — before scientists could say for sure whether it was one object or two. With the arrival of the photos, they are now calling the bigger sphere Ultima and the smaller one Thule.

Thule is estimated to be 9 miles (14 kilometers) across, while Ultima is thought to be 12 miles (19 kilometers).

Scientist Jeff Moore of NASA’s Ames Research Center said the two spheres formed when icy, pebble-size pieces coalesced in space billions of years ago. Then the spheres slowly spiraled closer to each other until they gently touched — as slowly as parking a car here on Earth at just a mile or two per hour — and stuck together.

Despite the slender connection point, the two lobes are “soundly bound” together, according to Moore.

 

Pluto, NASA, new horizons
This illustration provided by NASA shows the New Horizons spacecraft. NASA launched the probe in 2006; it’s about the size of a baby grand piano. VOA

Scientists have ascertained that the object takes about 15 hours to make a full rotation. If it were spinning fast — say, one rotation every three or four hours — the two spheres would rip apart.

Stern noted that the team has received less than 1 percent of all the data stored aboard New Horizons. It will take nearly two years to get it all.

The two-lobed object is what is known as a “contact binary.” It is the first contact binary NASA has ever explored. Having formed 4.5 billion years ago, when the solar system taking shape, it is also the most primitive object seen up close like this.

About the size of a city, Ultima Thule has a mottled appearance and is the color of dull brick, probably because of the effects of radiation bombarding the icy surface, with brighter and darker regions.

Both spheres are similarly red, while the barely perceptible neck connecting the two lobes is noticeably less red, probably because of particles falling down the steep slopes into that area.

Pluto, NASA, new horizons
New Horizons team members are seen during a press conference prior to the flyby of Ultima Thule by the New Horizons spacecraft, Dec. 31, 2018, at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. VOA

So far, no moons or rings have been detected. And scientists said there were no obvious impact craters in the latest photos but a few apparent “divots” and suggestions of hills and ridges. But better images should yield definitive answers in the days and weeks ahead.

Clues about the surface composition of Ultima Thule should start rolling in by Thursday. Scientists believe the icy exterior is probably a mix of water, methane and nitrogen, among other things.

The snowman picture was taken a half-hour before the spacecraft’s closest approach early Tuesday, from a distance of about 18,000 miles (28,000 kilometers).

Ultima Thule is an exquisite time machine — the most primitive object ever seen close up — that should provide clues to the origins of our solar system.

Also Read: NASA’s New Horizon Set Out To Make History

It’s neither a comet nor an asteroid, according to Stern, but rather “a primordial planetesimal.” Unlike comets and other objects that have been altered by the sun over time, Ultima Thule is in its pure, original state: It’s been in the deep-freeze Kuiper Belt on the fringes of our solar system from the beginning.

“This thing was born somewhere between 99 percent and 99.9 percent of the way back to T-zero (liftoff) in our solar system, really amazing,” Stern said. He added: “We’ve never seen anything like this before. It’s not fish or fowl. It’s something that’s completely different.”

Still, he said, when all the data comes in, “there are going to be mysteries of Ultima Thule that we can’t figure out.” (VOA)

STAY CONNECTED

18,956FansLike
362FollowersFollow
1,781FollowersFollow

Most Popular

People Move To Reading And Writing During Lockdown

With a deeply-engaged community of close to 3 million users in India, who spend more than 37 minutes daily reading, writing, and engaging on...

BlareMob – A New Music Sensation

Influenced by the music scene in international circuits like Miami, Ibiza, and Barcelona, Delhi based group, BlareMob, launched their latest offering that has six...

An Unique Experience Of Diverse Asia

A kaleidoscopic journey across Bali, Hong Kong, Kyrgyzstan, Myanmar, Thailand, and Vietnam captures the diverse landscapes, textures, and people of Asia. The exhibit is...

Twitter Tests New Feature for Automatic Translation of Tweets

Twitter has kicked off a test with a small group of users across iOS and Android in Brazil that automatically translates tweets that are...

Facebook Removes More Adult, Violent Content on Instagram

Facebook has removed more pieces of content related to adult nudity and sexual activity along with violent and graphic content on Instagram in the...

TikTok Secretly Collects Data in Violation of Google Policies: Report

TikTok secretly collected device data for months via its Android app using a technique that Google prohibits developers from using without consent of users,...

Here’s How You Can Avoid Smudging of Makeup Under a Mask

With the safety at the top of your mind hygiene rituals are replacing beauty routines, and wearing a face mask has become the new...

Here are Some Vaastu Tips to Help You Gain Good Health

By Puja Gupta A few changes in the Vaastu of your house can help you gain good health, even at a time when you might...

Recent Comments