Sentences with phrase «ancient magnetic field»

The evidence for this hypothesis is found in old rocks that preserved signs of Earth's ancient magnetic field.

Natural nuclear fission reactors may provide reasonable explanations for other «NASA mysteries» including: (1) Our Moon having a soft or molten core; (2) Tiny planet Mercury having a magnetic field; (3) Mars displaying evidence of an ancient magnetic field; (4) Our Moon displaying evidence of an ancient magnetic field; (5) Jupiter's moon Ganymede having an internally generated magnetic field; (6) Jupiter's moon Io being extremely volcanic; (7) Saturn's moon Enceladus showing evidence of internal heating; and, (8) Evidence of internal heat generation in Pluto's moon Charon:

«What did Earth's ancient magnetic field look like?.»

The geological record also doesn't show much evidence for major changes in the intensity of the ancient magnetic field over the past 4 billion years.

New work from Carnegie's Peter Driscoll suggests Earth's ancient magnetic field was significantly different than the present day field, originating from several poles rather than the familiar two.

Whenever it arose, an ancient magnetic field would have been a good, although not perfect, shield against the solar wind.

An ancient magnetic field could have made the 500 - million - year - old planet more hospitable to life, by preventing the Sun's powerful solar wind from stripping away the atmosphere.

Matuyama studied traces of Earth's ancient magnetic field frozen into basalt, a volcanic rock.

Decades after NASA's manned moon missions, a flurry of new research shows that this ancient magnetic field lasted for more than a billion years.

This contradiction — an ancient magnetic field without anything to power it — is forcing us to rethink our planet's insides.

What they discovered stunned them: The meteorites showed evidence of ancient magnetic fields similar to those of rocks formed on Earth within the planet's magnetic field.

Not exact matches

The island is one of the best places to peer into the history of Earth's magnetic field because its fluctuations are recorded in the ancient volcanic rock.

However, radio waves penetrate the fog to reveal hot cradles of baby stars, ghostly outlines of ancient supernova explosions, and glowing bands that follow the paths of intense magnetic fields.

In 2014, Weiss» group analyzed other ancient meteorites that formed within the solar system's first 2 to 3 million years, and found evidence of a magnetic field that was about 10 - 100 times stronger — about 5 - 50 microtesla.

External forces beating up the ancient moon may explain how it once maintained a magnetic field for more than 400 million years — longer than scientists had thought such a small object could be magnetized.

«First measurements taken of South Africa's Iron Age magnetic field history: Ancient ritualistic village burnings opened the door to data collection.»

A team of researchers has for the first time recovered a magnetic field record from ancient minerals for Iron Age southern Africa (between 1000 and 1500 AD).

«Because rock in the deep mantle moves less than a centimeter a year, we know the LLSVP is ancient, meaning it may be a longstanding site for the loss of magnetic field strength,» said Tarduno.

If that ancient field has persisted until today, it would make Mercury the planet with the longest - lasting magnetic field known.

If that ancient field has persisted all this time, it makes Mercury the planet with the longest - lasting magnetic field known.

Instead, researchers may focus on broadening their knowledge of conditions on the ancient Earth, rather than trying to determine whether its magnetic field existed more than 4.2 billion years ago.

This is an illustration of ancient Earth's magnetic field compared to the modern magnetic field courtesy of Peter Driscoll.

Geophysicists have traced the process back to early in Earth's history by measuring magnetic fields in ancient rocks, and some have attempted to extrapolate from the present motion of the plates the likely shape of the next supercontinent.

Studying the number of impact craters to calculate the age of these regions on the surface, scientists estimated that the planet's magnetic field is very ancient — at least 3.7 billion to 3.9 billion years old.

Powerful solar events paired with a developing magnetic field could have combined to make ancient Earth hospitable to life

Ancient explorers noted that migratory birds and other animals were guided by something powerful but it wasn't until global navigation and earth mapping became possible that scientists could «see» the magnetic fields marking the earth's surface.