Search results for oort cloud

Planetary Sciences Aug 22, 2024

Meteor showers shed light on where comets formed in the early solar system

An international team of 45 researchers studying meteor showers has found that not all comets crumble the same way when they approach the sun. In a paper published in the journal Icarus, they ascribe the differences to the ...

Planetary Sciences Jul 16, 2024

Not just space rocks: Six things we've learned about Earth from meteorites and comets

Apart from the sun, its planets and their moons, our solar system has vast amounts of space rocks—fragments left over from the formation of the inner planets.

Astronomy Jul 12, 2024

How astronomers work out the size of the solar system

The size of the solar system is defined by the volume of space over which the sun's influence exceeds those of other nearby stars in the Milky Way galaxy. This influence derives from two fundamental forces of nature: gravity ...

Astronomy Jun 26, 2024

A new horizon for the Kuiper Belt: Subaru telescope's wide-field observations

The Subaru Telescope's wide and deep imaging observations are contributing information to the New Horizons spacecraft as it moves through the outer solar system. By applying a unique analysis method to images of Kuiper Belt ...

Planetary Sciences Jun 17, 2024

Study of meteorite 'Northwest Africa 14250' reveals composition of the early solar system

A multi-institutional team of planetary scientists has learned more about the early composition of the solar system by studying a meteorite named Northwest Africa 14250. In their study, published in the journal Science Advances, ...

Planetary Sciences Nov 27, 2023

What would happen to Earth if a rogue star came too close?

Stars are gravitationally fastened to their galaxies and move in concert with their surroundings. But sometimes, something breaks the bond. If a star gets too close to a supermassive black hole, for example, the black hole ...

Astronomy Oct 23, 2023

In 1952, a group of three 'stars' vanished—astronomers still can't find them

On July 19, 1952, Palomar Observatory was undertaking a photographic survey of the night sky. Part of the project was to take multiple images of the same region of sky, to help identify things such as asteroids. At around ...

Astronomy Oct 16, 2023

JWST observes the Kuiper Belt: Sedna, Gonggong, and Quaoar

The Kuiper Belt, the vast region at the edge of our solar system populated by countless icy objects, is a treasure trove of scientific discoveries. The detection and characterization of Kuiper Belt Objects (KBOs), sometimes ...

Planetary Sciences Jun 26, 2023

Paper suggests there could be captured planets in the Oort cloud

Our solar system has had a chaotic past. Earth and the other planets are now in stable orbits, but while they were forming they experienced drastic location shifts. Jupiter was likely much closer to the sun than it is now, ...

Astronomy Jun 23, 2023

White dwarf's strong magnetic field fooled scientists into thinking it would pass close to our solar system, study shows

A trio of astronomers from Armagh Observatory & Planetarium and Centro de AstrobiologĂ­a (CAB), CSIC-INTA has found that a white dwarf that was recently projected to make its way toward our solar system will not do so.

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