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15/04US Army names new MV-75 tiltrotor ‘Cheyenne II’
13/04UK MoD orders Skyhammer counter-drone missiles against Iranian Shahed threat
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11/04Full success of the Artemis II NASA's first crewed lunar flyby in 50 years
11/04Falcon 9 launches NG-24 Cygnus cargo spacecraft to the ISS for resupply mission
09/04Belgium orders 5 Cessna SkyCourier twin turboprops to serve with the country’s special forces
25/04Some 30 early Boeing 777X need modification and upgrade before delivery
24/04Chinese Long March 2D launches PRSC-EO3 satellite for Pakistan, lofts internet test and environment monitoring
23/04Falcon 9 rocket launches final GPS3 satellite into orbit for US Space Force
20/04Airbus develops new A400M Mothership variant to launch 12 Taurus missiles or 50 drones for long-range strikes
19/04US Navy seizes Iranian container ship Touska using 127 mm naval gunfire in Gulf interdiction operation
19/04North Korea tests 5 Hwasong-11 ballistic missiles with cluster warhead capability
18/04Australia selected the upgraded Mogami-class frigate for 11-unit order, after a competitive tender against Germany’s Meko A-200
18/04American Airlines rejects idea of merger with United
17/04Three US aircraft carrier groups and 10 destroyers blockade Strait of Hormuz
15/04US Army names new MV-75 tiltrotor ‘Cheyenne II’
13/04UK MoD orders Skyhammer counter-drone missiles against Iranian Shahed threat
13/04France edges closer to Eurodrone exit with its defence programming revision
11/04Full success of the Artemis II NASA's first crewed lunar flyby in 50 years
11/04Falcon 9 launches NG-24 Cygnus cargo spacecraft to the ISS for resupply mission
09/04Belgium orders 5 Cessna SkyCourier twin turboprops to serve with the country’s special forces
25/04Some 30 early Boeing 777X need modification and upgrade before delivery
24/04Chinese Long March 2D launches PRSC-EO3 satellite for Pakistan, lofts internet test and environment monitoring
23/04Falcon 9 rocket launches final GPS3 satellite into orbit for US Space Force
20/04Airbus develops new A400M Mothership variant to launch 12 Taurus missiles or 50 drones for long-range strikes
19/04US Navy seizes Iranian container ship Touska using 127 mm naval gunfire in Gulf interdiction operation
19/04North Korea tests 5 Hwasong-11 ballistic missiles with cluster warhead capability
18/04Australia selected the upgraded Mogami-class frigate for 11-unit order, after a competitive tender against Germany’s Meko A-200
18/04American Airlines rejects idea of merger with United
17/04Three US aircraft carrier groups and 10 destroyers blockade Strait of Hormuz
15/04US Army names new MV-75 tiltrotor ‘Cheyenne II’
13/04UK MoD orders Skyhammer counter-drone missiles against Iranian Shahed threat
13/04France edges closer to Eurodrone exit with its defence programming revision
11/04Full success of the Artemis II NASA's first crewed lunar flyby in 50 years
11/04Falcon 9 launches NG-24 Cygnus cargo spacecraft to the ISS for resupply mission
09/04Belgium orders 5 Cessna SkyCourier twin turboprops to serve with the country’s special forces
25/04Some 30 early Boeing 777X need modification and upgrade before delivery
24/04Chinese Long March 2D launches PRSC-EO3 satellite for Pakistan, lofts internet test and environment monitoring
23/04Falcon 9 rocket launches final GPS3 satellite into orbit for US Space Force
20/04Airbus develops new A400M Mothership variant to launch 12 Taurus missiles or 50 drones for long-range strikes
19/04US Navy seizes Iranian container ship Touska using 127 mm naval gunfire in Gulf interdiction operation
19/04North Korea tests 5 Hwasong-11 ballistic missiles with cluster warhead capability
18/04Australia selected the upgraded Mogami-class frigate for 11-unit order, after a competitive tender against Germany’s Meko A-200
18/04American Airlines rejects idea of merger with United
17/04Three US aircraft carrier groups and 10 destroyers blockade Strait of Hormuz
15/04US Army names new MV-75 tiltrotor ‘Cheyenne II’
13/04UK MoD orders Skyhammer counter-drone missiles against Iranian Shahed threat
13/04France edges closer to Eurodrone exit with its defence programming revision
11/04Full success of the Artemis II NASA's first crewed lunar flyby in 50 years
11/04Falcon 9 launches NG-24 Cygnus cargo spacecraft to the ISS for resupply mission
09/04Belgium orders 5 Cessna SkyCourier twin turboprops to serve with the country’s special forces
25/04Some 30 early Boeing 777X need modification and upgrade before delivery
24/04Chinese Long March 2D launches PRSC-EO3 satellite for Pakistan, lofts internet test and environment monitoring
23/04Falcon 9 rocket launches final GPS3 satellite into orbit for US Space Force
20/04Airbus develops new A400M Mothership variant to launch 12 Taurus missiles or 50 drones for long-range strikes
19/04US Navy seizes Iranian container ship Touska using 127 mm naval gunfire in Gulf interdiction operation
19/04North Korea tests 5 Hwasong-11 ballistic missiles with cluster warhead capability
18/04Australia selected the upgraded Mogami-class frigate for 11-unit order, after a competitive tender against Germany’s Meko A-200
18/04American Airlines rejects idea of merger with United
17/04Three US aircraft carrier groups and 10 destroyers blockade Strait of Hormuz
15/04US Army names new MV-75 tiltrotor ‘Cheyenne II’
13/04UK MoD orders Skyhammer counter-drone missiles against Iranian Shahed threat
13/04France edges closer to Eurodrone exit with its defence programming revision
11/04Full success of the Artemis II NASA's first crewed lunar flyby in 50 years
11/04Falcon 9 launches NG-24 Cygnus cargo spacecraft to the ISS for resupply mission
09/04Belgium orders 5 Cessna SkyCourier twin turboprops to serve with the country’s special forces

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