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22/11Boeing wins $2.4 billion deal with USAF for 15 KC-46As
22/11Blue Origin launches 9th crewed New Shepard suborbital mission
22/11Romania has joined the F-35 Lightning II program signing a LOA to acquire 32 F-35 Lightning II aircraft from Lockheed Martin through a US FMS
21/11Embraer targets Chinese E-Jet sales as Brazil and China tighten ties
19/11SpaceX launches 6th Starship from Boca Chica, Texas in the presence of President-elect Donald Trump, but aborts booster landing
14/11China has unveiled a fully reusable Long March 9 rocket concept at Zhuhai Airshow reminiscent of SpaceX’s Starship
14/11US F-35Cs complete first known combat mission
14/11China conducted its 55th orbital launch of 2024, with a Long March 4B sending the Haiyang-4 oceanography satellite
11/11Chinese commercial Lijian-1 rocket launches 15 satellites
17/10US B-2 stealth bombers strike targets in Yemen
16/10Airbus defence division will cut 2,500 jobs
16/10China Long March 4C launches new Gaofen-1 remote sensing satellite
15/10China Long March 6A launches the 2nd group of 18 satellites for the planned 14,000-satellite Thousand Sails constellation
14/10Saudi Arabia advances Hellfire, AIM-9X missile deals worth $900 million
14/10Falcon Heavy launches NASA's Europa Clipper mission
22/11Boeing wins $2.4 billion deal with USAF for 15 KC-46As
22/11Blue Origin launches 9th crewed New Shepard suborbital mission
22/11Romania has joined the F-35 Lightning II program signing a LOA to acquire 32 F-35 Lightning II aircraft from Lockheed Martin through a US FMS
21/11Embraer targets Chinese E-Jet sales as Brazil and China tighten ties
19/11SpaceX launches 6th Starship from Boca Chica, Texas in the presence of President-elect Donald Trump, but aborts booster landing
14/11China has unveiled a fully reusable Long March 9 rocket concept at Zhuhai Airshow reminiscent of SpaceX’s Starship
14/11US F-35Cs complete first known combat mission
14/11China conducted its 55th orbital launch of 2024, with a Long March 4B sending the Haiyang-4 oceanography satellite
11/11Chinese commercial Lijian-1 rocket launches 15 satellites
17/10US B-2 stealth bombers strike targets in Yemen
16/10Airbus defence division will cut 2,500 jobs
16/10China Long March 4C launches new Gaofen-1 remote sensing satellite
15/10China Long March 6A launches the 2nd group of 18 satellites for the planned 14,000-satellite Thousand Sails constellation
14/10Saudi Arabia advances Hellfire, AIM-9X missile deals worth $900 million
14/10Falcon Heavy launches NASA's Europa Clipper mission
22/11Boeing wins $2.4 billion deal with USAF for 15 KC-46As
22/11Blue Origin launches 9th crewed New Shepard suborbital mission
22/11Romania has joined the F-35 Lightning II program signing a LOA to acquire 32 F-35 Lightning II aircraft from Lockheed Martin through a US FMS
21/11Embraer targets Chinese E-Jet sales as Brazil and China tighten ties
19/11SpaceX launches 6th Starship from Boca Chica, Texas in the presence of President-elect Donald Trump, but aborts booster landing
14/11China has unveiled a fully reusable Long March 9 rocket concept at Zhuhai Airshow reminiscent of SpaceX’s Starship
14/11US F-35Cs complete first known combat mission
14/11China conducted its 55th orbital launch of 2024, with a Long March 4B sending the Haiyang-4 oceanography satellite
11/11Chinese commercial Lijian-1 rocket launches 15 satellites
17/10US B-2 stealth bombers strike targets in Yemen
16/10Airbus defence division will cut 2,500 jobs
16/10China Long March 4C launches new Gaofen-1 remote sensing satellite
15/10China Long March 6A launches the 2nd group of 18 satellites for the planned 14,000-satellite Thousand Sails constellation
14/10Saudi Arabia advances Hellfire, AIM-9X missile deals worth $900 million
14/10Falcon Heavy launches NASA's Europa Clipper mission
22/11Boeing wins $2.4 billion deal with USAF for 15 KC-46As
22/11Blue Origin launches 9th crewed New Shepard suborbital mission
22/11Romania has joined the F-35 Lightning II program signing a LOA to acquire 32 F-35 Lightning II aircraft from Lockheed Martin through a US FMS
21/11Embraer targets Chinese E-Jet sales as Brazil and China tighten ties
19/11SpaceX launches 6th Starship from Boca Chica, Texas in the presence of President-elect Donald Trump, but aborts booster landing
14/11China has unveiled a fully reusable Long March 9 rocket concept at Zhuhai Airshow reminiscent of SpaceX’s Starship
14/11US F-35Cs complete first known combat mission
14/11China conducted its 55th orbital launch of 2024, with a Long March 4B sending the Haiyang-4 oceanography satellite
11/11Chinese commercial Lijian-1 rocket launches 15 satellites
17/10US B-2 stealth bombers strike targets in Yemen
16/10Airbus defence division will cut 2,500 jobs
16/10China Long March 4C launches new Gaofen-1 remote sensing satellite
15/10China Long March 6A launches the 2nd group of 18 satellites for the planned 14,000-satellite Thousand Sails constellation
14/10Saudi Arabia advances Hellfire, AIM-9X missile deals worth $900 million
14/10Falcon Heavy launches NASA's Europa Clipper mission

Your are here : Home News / Most of Earth's water came from asteroids, not comets

SPACE

Most of Earth's water came from asteroids, not comets

Published by Aero3A

Asteroids, not comets, may have delivered most of Earth's water to the planet when the solar system was young, new data from a probe orbiting a comet suggests.

Comets are some of the solar system's most primitive building blocks, with many dating to soon after its formation. Scientists think that these dirty snowballs probably helped seed Earth with key ingredients for life, such as organic compounds.

The European Space Agency's (ESA) Rosetta spacecraft is helping scientists learn more about the role these icy nomads have played in the evolution of the solar system and life on Earth by analyzing the composition of Comet 67P/Churyumov–Gerasimenko. In August, Rosetta became the first spacecraft to orbit a comet, and in November, its Philae lander became the first probe to make a soft touchdown on a comet's surface. Rosetta is also the first mission to escort a comet as it travels around the sun