Sentences with phrase «produced by the asteroid»

New research, led by the University of Southampton, has questioned the role played by ocean acidification, produced by the asteroid impact that killed the dinosaurs, in the extinction of ammonites and other planktonic calcifiers 66 million years ago.

Not exact matches

Further calculations by Catling and his team conclude that no abiotic methane sources on a rocky planet could produce enough of the gas to counteract this process — whether it is volcanic outgassing from a planet's interior, chemical reactions in hydrothermal vents, even asteroid impacts.

Many young stars known to host planets also possess disks containing dust and icy grains, particles produced by collisions among asteroids and comets also orbiting the star.

Eventually two competing explanations emerged: Either some outside force helped stir the lunar interior and drove the dynamo, or the magnetized rocks were created by short - lived fields produced during violent asteroid impacts on the lunar surface (SN: 12/17/11, p. 17).

However, there were other possible sources of water: interplanetary dust particles produced by cometary activity and asteroid collisions, icy rings, or one of the 60 Jovian satellites.

Either wobbly rotation produced by Earth's gravitational tug or asteroids smacking into the lunar surface may have triggered enough turbulence in the moon's molten core to generate a long - lasting magnetic field, report two teams of scientists in the Nov. 10 Nature.

Paleomagnetic studies of a meteorite from asteroid Vesta reveal remanent magnetization produced by an ancient core dynamo.

If that idea is correct, then it implies that the moon's water is mostly ancient — contrary to scientists who have argued that water was delivered more recently by asteroid impacts or even produced by a hail of protons known as the solar wind.

Life prefers to use the lighter Carbon - 12, which reacts a bit more readily, so amino acid molecules from terrestrial life will have less Carbon - 13 compared to amino acids produced by non-biological reactions in asteroids.

Designed by students at the University of Colorado at Boulder, SDC is detecting dust grains produced by collisions among asteroids, comets, and Kuiper Belt objects during New Horizons» journey.

Given that Tau Ceti does not appear to be a young star, the ring of dusty debris is believed to be produced by collisions between larger comets and asteroids that break them down into smaller and smaller pieces, and Tau Ceti's disk is similar in size and shape to the disk of comets and asteroids that orbits the Sun, Sol.

«While Ceres is a lot bigger than the candidate asteroids that NASA is working on sending humans to, many of these smaller bodies are produced by collisions with larger asteroids such as Ceres and Vesta.

The meteorite is an achondrite, a relatively rare type of space rock that comes from a planet or big asteroid — something large that generated enough internal heat early in its history to melt partially, producing a metallic core surrounded by rock.