•   
  •   

US News Arrokoth, the Farthest, Oldest Solar System Object Ever Studied, Could Reveal the Origins of Planets

06:30  14 february  2020
06:30  14 february  2020 Source:   mentalfloss.com

February Full 'Snow' Moon Is First of Four Consecutive Supermoons

  February Full 'Snow' Moon Is First of Four Consecutive Supermoons "Supermoon" is a popular term for a full moon occurring when our natural satellite is close to its perigee, or its minimum distance from the Earth. "The term itself is of no scientific value: astronomers prefer to call itperigee full moon, but undoubtedly 'supermoon' is by far a much more charming name," Gianluca Masi, an astronomer from The Virtual Telescope Project, told Newsweek.According to Masi, the moon will be located around 225,000 miles from the Earth when it is full this weekend. As a result, it will be around 7 percent larger and 10-15 percent brighter than an average full moon.

Located past Pluto, the ultrared binary object Arrokoth is the farthest and oldest body ever studied up close. A trip to the most remote part of our solar system has revealed some surprising insights into the formation of If this is the origin of Arrokoth , it was likely the origin of other planetesimals

It’s red, it’s cold, it’s 4bn years old : Nasa data from Arrokoth reveals ‘profound truths’ about the solar system . Nasa has unveiled details of the most distant object visited by a spacecraft, in observations that could resolve a decades-long puzzle of how the planets first emerged from the hazy dust of the

(Video by The Independent)

A trip to the most remote part of our solar system has revealed some surprising insights into the formation of our own planet. Three new studies based on data gathered on NASA's flyby of Arrokoth—the farthest object in the solar system from Earth and the oldest body ever studied—is giving researchers a better idea of how the building blocks of planets were formed, what Arrokoth's surface is made of, and why it looks like a giant circus peanut.

Young Tory Jailed For Menacing Message About Labour MP Yvette Cooper

  Young Tory Jailed For Menacing Message About Labour MP Yvette Cooper A Conservative activist has been jailed after sending a malicious message threatening senior Labour MP Yvette Cooper with harm. heJoshua Spencer, who described himself on Twitter as deputy chair of Normanton, Pontefract and Castleford Conservatives, admitted sending the message about the Commons home affairs committee chair on April 11.

on 1 January 2019 (UTC time), Arrokoth became the farthest and most primitive object in the Solar System visited by a light for all who search for meaning and understanding of the origins of the. Preliminary observations with the Hubble Space Telescope in 2016 revealed that Arrokoth has a red

The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets

Arrokoth is a 21-mile-wide space object that formed roughly 4 billion years ago. Located past Pluto in the Kuiper Belt, it's received much less abuse than other primordial bodies that sit in asteroid belts or closer to the sun. "[The objects] that form there have basically been unperturbed since the beginning of the solar system," William McKinnon, lead author of one of the studies, said at a news briefing.

  Arrokoth, the Farthest, Oldest Solar System Object Ever Studied, Could Reveal the Origins of Planets © NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute/Roman Tkachenk... That means, despite its age, Arrokoth doesn't look much different today than when it first came into being billions of years ago, making it the perfect tool for studying the origins of planets.

In 2019, the NASA spacecraft New Horizons performed a flyby of Arrokoth on the edge of the solar system 4 billion miles away from Earth. The probe captured a binary object consisting of two connected lobes that were once separate fragments. In their paper, McKinnon and colleagues explain that Arrokoth "is the product of a gentle, low-speed merger in the early solar system."

British scientist says it is 'almost a racing certain' that the icy seas on Jupiter's moon Europa are home to alien life that are 'octopus-like creatures'

  British scientist says it is 'almost a racing certain' that the icy seas on Jupiter's moon Europa are home to alien life that are 'octopus-like creatures' Monica Grady, a British space scientist, says it is 'almost a racing certain' that Jupiter's moon Europa is harboring to alien life in its icy seas, but believes they are 'octopus' like creatures.A British space scientist says it is 'almost a racing certain' that Jupiter's moon Europa is home to alien life, but believes they are 'octopus' like creatures.

“ Objects like Arrokoth certainly could have delivered them to early Earth from the far edge of the Solar System , but that's not the only possible source. Dr Grundy believes that the uniformity of colour on Arrokoth , shows that the tholins were floating around at the time of planet building, and

The unusually-shaped object named Arrokoth - the most distant body ever explored by man - was discovered 4.1 billion miles from Earth by NASA's New Arrokoth was found to contain organic building blocks, demonstrating that life is possible even in the furthest reaches of the Solar System .

Prior to these new findings, there were two competing theories into how the solid building blocks of planets, or planetesimals, form. The first theory is called hierarchical accretion, and it states that planetesimals are created when two separate parts of a nebula—the cloud of gas and space dust born from a dying star—crash into one another.

Gallery: The most stunning space photos ever (Photo Services)

The latest observations of Arrokoth support the second theory: Instead of a sudden, violent collision, planetesimals form when gases and particles in a nebula gradually amass to the point where they become too dense to withstand their own gravity. Nearby components meld together gradually, and a planetesimal is born. "All these particles are falling toward the center, then whoosh, they make a big planetesimal. Maybe 10, 20, 30, 100 kilometers across," said McKinnon, a professor of Earth and planetary sciences at Washington University. This type of cloud collapse typically results in binary shapes rather than smooth spheroids, hence Arrokoth's peanut-like silhouette.

If this is the origin of Arrokoth, it was likely the origin of other planetesimals, including those that assembled Earth. "This is how planetesimal formation took place across the Kuiper Belt, and quite possibly across the solar system," New Horizons principal investigator Alan Stern said at the briefing.

The first color image of Ultima Thule, 20-mile-long (32-km-long) space rock, taken by NASA's New Horizons spacecraft, taken at a distance of 85,000 miles (137,000 kilometers) at 4:08 GMT on January 1, 2019, highlights its reddish surface in this image released by Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, U.S., on January 2, 2019. © Thomson Reuters The first color image of Ultima Thule, 20-mile-long (32-km-long) space rock, taken by NASA's New Horizons spacecraft, taken at a distance of 85,000 miles (137,000 kilometers) at 4:08 GMT on January 1, 2019, highlights its reddish surface in this image released by Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, U.S., on January 2, 2019. The package of studies, published in the journal Science, also includes findings on the look and substance of Arrokoth. In their paper, Northern Arizona University planetary scientist Will Grundy and colleagues reveal that the surface of the body is covered in "ultrared" matter so thermodynamically unstable that it can't exist at higher temperatures closer to the sun.

The ultrared color is a sign of the presence of organic substances, namely methanol ice. Grundy and colleagues speculate that the frozen alcohol may be the product of water and methane ice reacting with cosmic rays. New Horizons didn't detect any water on the body, but the researchers say its possible that H2O was present but hidden from view. Other unidentified organic compounds were also found on Arrokoth.

New Horizon's flyby of Pluto and Arrokoth took place over the course of a few days. To gain a further understanding of how the object formed and what it's made of, researchers need to find a way to send a probe to the Kuiper Belt for a longer length of time, perhaps by locking it into the orbit of a larger body. Such a mission could tell us even more about the infancy of the solar system and the composition of our planetary neighborhood's outer limits.

The first person to see the 'Pale Blue Dot' image still has it stashed in her closet .
Somewhere in that little bright speck, I was sitting at my desk. ”Thirty-four minutes after capturing Earth, Voyager’s cameras turned off forever. In the now-iconic image, a small, unobtrusive pinprick of light hovers amid a ray of scattered sunlight, appearing cosmically inconsequential. The photo’s legacy is that it has inspired the opposite response: a deep recognition of Earth’s importance, its fragility, its uniqueness.“That’s here. That's home. That's us.

—   Share news in the SOC. Networks

Topical videos:

usr: 0
This is interesting!