NASA's New Horizons team publishes first Kuiper Belt flyby science results

Source: Xinhua| 2019-05-17 18:06:02|Editor: xuxin
Video PlayerClose

LOS ANGELES, May 17 (Xinhua) -- The National Aeronautics and Space Administration's (NASA) New Horizons mission team has published the first profile of the Kuiper Belt object (KBO) nicknamed "Ultima Thule," the most distant object ever explored by mankind.

New Horizons performed the farthest flyby in history at 12:33 a.m. EST (0533 GMT) on Jan. 1 this year, as it approached Ultima Thule within 2,200 miles (about 3,540 km) of the surface at a velocity of 31,500 miles (about 50,694 km) per hour.

The mission team published the first peer-reviewed scientific results and interpretations in the May 17 issue of the journal Science, analyzing the first sets of data gathered during the flyby.

The initial data revealed the object's development, geology and composition. The 36-km-long Ultima Thule is a contact binary, consisting of a large, strangely flat lobe (nicknamed "Ultima") connected to a smaller, rounder lobe (nicknamed "Thule"), at a juncture nicknamed "the neck."

How the two lobes got their unusual shape is an unanticipated mystery that likely relates to how they formed billions of years ago, according to the scientific results.

"We're looking into the well-preserved remnants of the ancient past," said New Horizons Principal Investigator Alan Stern. "There is no doubt that the discoveries made about Ultima Thule are going to advance theories of solar system formation."

New Horizons researchers are also investigating a range of surface features on Ultima Thule, such as bright spots and patches, hills and troughs, and craters and pits.

In color and composition, Ultima Thule is very red, even redder than the much larger, 2,400-km-wide Pluto, which New Horizons explored at the inner edge of the Kuiper Belt in 2015.

Ultima Thule is in fact the reddest outer solar system object ever visited by spacecraft, according to the scientific results. Its reddish hue is believed to be caused by modification of the organic materials on its surface.

Data transmission from the flyby continues, and will go on until the late summer 2020. In the meantime, New Horizons continues to carry out new observations of additional Kuiper Belt objects it passes in the distance, according to the mission team.

The New Horizons spacecraft is now 4.1 billion miles (6.6 billion km) from Earth, operating normally and speeding deeper into the Kuiper Belt at nearly 33,000 miles (53,000 km) per hour, according to the team.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
国产无码在线观看免费在线,37pao国产成视频,日韩一区二区视频在线,国产国产人免费人成免费视频麻豆
日本免费高清一区二区三区 | 亚洲不卡中文字幕 | 婷婷久久高清国外AV免费 | 亚洲精品国产高清一线久久 | 久久国产香蕉观看八 | 亚洲欧洲日韩国产精品妖精 |