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Oort cloud News

Op-Ed: Interstellar objects – More incoming, but what, when and where?

Sydney - The recent discovery of two interstellar objects, comet 2I/Borisov and asteroid Oumuamua in the solar system has raised the bar for expectations and predictions. Expecting more is one thing. The more pressing question is exactly what might be coming.

Alien star passed through our solar system just recently

NASA publications have confirmed that an alien star passed through our own solar system just 70,000 years ago. This is recent in astronomical terms and the star was not alone.

Galactic dark matter may account for Earth being hit by comets

Cambridge - Earth coming under bombardment by comets could be a regular astronomical event, suggest two Harvard University researchers in a recently published research paper.

Our sun may have 'stolen' some of its comets from other stars

When we look up at a comet in the night sky, it may be a 'stolen pleasure: we may be looking at something that comes originally from a distant star.
 

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The solar system takes 1 cosmic year lasting about 225-250 million years to orbit the Milky Way s ga...
The solar system takes 1 cosmic year lasting about 225-250 million years to orbit the Milky Way's galactic centre but during that time it oscillates above and below the galactic plane every 32 million years or so.
Physics 7, 41 (2014) | DOI: 10.1103/Physics.7.41
An artist s concept of the Oort cloud. Note that the distance scale is logarithmic. Compared to the ...
An artist's concept of the Oort cloud. Note that the distance scale is logarithmic. Compared to the size of planetary orbits, the Oort cloud is very far away. If the Sun passed within 2 light years of another sun-like star, the stars' Oort clouds would overlap and their comets would intermingle.
Image credit: ESO
V838 Mon  a star with an expanding gas shell  purported as photographic evidence of Nibiru
V838 Mon, a star with an expanding gas shell, purported as photographic evidence of Nibiru
NASA
Scholz s Star passed within 0.8 light years of our solar system just 70 000 years ago.
Scholz's Star passed within 0.8 light years of our solar system just 70,000 years ago.
NASA
NASA artist s rendering of the spherical Oort Comet Cloud and of the planar Kuiper belt comet region...
NASA artist's rendering of the spherical Oort Comet Cloud and of the planar Kuiper belt comet region. Comets orbit the Sun. Oort comets are long-period with orbit periods of more than 200 years and as much a 1 million years. Kuiper belt comets are short-period with orbits of less than 200 years.
NASA
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NASA
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NASA

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