قالب وردپرس درنا توس
Home https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ Science https://server7.kproxy.com/servlet/redirect.srv/sruj/smyrwpoii/p2/ 'Earth-like' water has been spotted inside the 'Christmas comet'

'Earth-like' water has been spotted inside the 'Christmas comet'



'A vast reservoir of Earth-like water' was found inside the 'Christmas Comet' as it flew past Earth last year and may explain the origins of our planet's oceans, NASA says

  • 'flying' observatory at high altitude
  • It found some comets had the same ratio of 'regular' and 'heavy' water as Earth
  • Some of this water formed the seas and oceans that exists today
3:14 EDT, May 24, 2019 |

The Christmas Comet which flew past Earth in December last year contained a vast reservoir of Earth-like water similar to what is in our oceans today .

NASA scientists claim this backs up the theory that distant space rocks delivered the first water to Earth that went on to form oceans and seas

Water on Earth exists in two forms, as regular water and a 'heavier' version called HDO.

Hydrogen with an extra particle, and a neutron, is known as an isotope and called deuterium, and the ratio of normal water to deuterium varies.

The ratio of the Christmas Comet is the same as on Earth, indicating they share the same origin.

Comets colliding with the earth in the early days of our solar system may have delivered the first water to our planet that formed its seas and oceans

Comets colliding with the earth in the early days of our solar system may have delivered the first water to our planet that formed its seas and oceans ” class=”blkBorder img-share” />

Comets colliding with the earth in the early days of our solar system may have delivered the first water to our planet that formed its seas and oceans

NASA's flying Stratospheric Observatory for Infrared Astronomy, known as SOFIA, is the world's largest telescope and took measurements of the comet.

It collected data from the comet 46P / Wirtanen, which made a close approach to Earth's surface in December, and was dubbed the Christmas Comet.

'We have identified a vast reservoir of Earth-like water in the outer reaches of the solar system,' said Darek Lis, lead author of the study.

WHAT IS DEUTERIUM?

Deuterium is an isotope of water, meaning it has the same amount of protons but an extra neutron compared to regular water.

It exists naturally but often the ratio of water to deuterium can reveal information.

Deuterium has a natural abundance in the Earth's oceans of about one atom in 6,420 of hydrogen.

The observations have made scientists think that comets could have first delivered water to Earth because the ratio of two types of water molecules on the comet

Both forms of water exist on earth, but in different ratios, so the fact that this ratio is similar in both ocean and on comets could suggest that the comets delivered some water to Earth.

Previously, this ratio was hard to measure, until more powerful machines like SOFIA

'Measuring this ratio is difficult,' said NASA in a statement.

 The Earth's oceans contain both regular water and a naturally occurring 'heavy' water where the hydrogen atom in each water molecule contains and extra particles called neutron

The earth's oceans contain both regular water and a naturally occurring 'heavy' 19659032] This weightier version of water naturally exists alongside regular water in the Earth's oceans but in a much smaller proportion. The image shows the Christmas comet seen from Earth ” class=”blkBorder img-share” />

This weightier version of water naturally exists alongside regular water in the Earth's oceans but in a much smaller proportion. The image shows the Christmas comet seen from Earth

 This weightier version of water naturally exists alongside regular water in the Earth's oceans but in a much smaller proportion. The image shows the Christmas comet taken by SOFIA

This weightier version of water exists naturally alongside regular water in the Earth's oceans but in a much smaller proportion.

The Christmas Comet, or 46P / Wirtanen, the brightest comet of 2018, streaked across the sky at a distance of 7.4 million miles (12 million

The spacecraft's instrument captured the glow from the comet's coma, a stream like a cloud of gas that the comet ejects as

The close fly-by allowed astronomers to study it in detail combining the capabilities of the telescope and NASA's X-rap Observatory.

The team said at the time investigating what the comet is made of and how the gases inside can be changed when exposed to sunlight and radiation.

The Christmas comet is not actually the color blue, this was applied to high-resolution grayscale exposures during post-processing.

The inner part of a comet's coma is normally not visible from Earth.

'Ground and space telescopes can study this level of detail in comets only when they pass near Earth, and missions to visit comets, like Rosetta, are rare.'

Using data from SOFIA, scientists then studied a number of comets and saw that a similar water ratio to that on earth existed in other comets, irrespective of where they came from.

This could mean that all comets could have a heavy-to-regular water ratio similar to Earth's oceans and that they could have delivered a large fraction of water to Earth, said NASA scientists.

Dominique Bockelée- Morvan, a scientist at the Paris Observatory and the French National Center for Scientific Research, said: 'This is the first time we could relate the heavy-to-regular water ratio of all comets to a single factor.'

Planets form from matter that orbits and star, which look like the disks around a star

Small pieces of this debris can stick together and grow larger over time, with the remaining matter not used in the formation remaining in our solar system, existing large structures such as the Kuiper Belt or Oort cloud.

Scientists have been able to study this ratio in about a dozen comets since the 1980s.

Advertisement


Source link