Search Results for: oumuamua

Is ‘Oumuamua a frozen piece of an exoPluto?

A new theory about ‘Oumuamua suggests the weird object that passed through our solar system in 2017 was a remnant of a Pluto-like world from another solar system. As one scientist said, “‘Oumuamua may be the first piece of an exoplanet brought to us.”

A computer-simulated image of a cigar-shaped body made of varying materials.

Is ‘Oumuamua a fragment of a shattered super-Earth?

Computer simulations confirm that ‘Oumuamua – an object from another star system that sped near our sun in 2017 – likely formed via a close encounter with its star. ‘Oumuamua may have originated in a debris disk, they said, or even a shattered super-Earth.

Long asteroid-like object in space.

Was ‘Oumuamua a cosmic dust bunny?

‘Oumuamua – the weird object that entered our solar system in 2017 and quickly fled back toward interstellar space – might not be an asteroid or comet from a distant solar system, as many believed. It might instead be a “cosmic dust bunny.”

Radio search finds no artificial emissions from ‘Oumuamua

“We were looking for a signal that would prove that this object incorporates some technology.”

Could ‘Oumuamua be an alien lightsail?

The object we call ‘Oumuamua entered our solar system a year ago and quickly left again. It’s a very puzzling object. Could it be an alien lightsail? A new paper from Harvard discusses that possibility.

Which one is ‘Oumuamua’s home star?

The 1st object known to be from another solar system passed through our solar system a year ago. Where did it come from? Astronomers have identified 4 plausible candidates.

5 things we know – and 5 we don’t – about ‘Oumuamua

Mysterious ‘Oumuamua is the 1st confirmed interstellar object to pass through our solar system.

Oumuamua’s path in our solar system

You’ve probably read about this unprecedented visitor from interstellar space. Astronomer Guy Ottewell thought you’d like to see its trajectory through our solar system.

Ball of light with tail surrounded by colorful streaks.

Interstellar visitor Borisov could be 1st truly pristine comet yet seen

Comet 2I/Borisov is the 2nd known object to pass near our sun from outside our solar system. Its 2019 pass near our sun might have been its first-ever interaction with a star. If so, it’s among the most pristine, or unspoiled, objects yet known.

A human standing under the Milky Way in starry sky, looking up.

The 1st sign of intelligent life beyond Earth?

Physicist Avi Loeb of Harvard believes we should take seriously the idea that ‘Oumuamua – the 1st known object to pass through our solar system from interstellar space – might have been created by an alien civilization. His new book is called “Extraterrestrial.”

A dish type radio telescope, at night, with a jagged line of signal from the stars reaching it.

New Exotica Catalog will help guide search for ET

“What if extraterrestrial intelligences are not like us, but are found in the frigid reaches of the outer solar system, the extreme gravity of neutron stars, the brilliant cores of active galaxies, or the hearts of the richest galaxy clusters?”

Large thin ring around a bluish spiral on black background.

Are these 19 eccentric asteroids from other star systems?

In the first discovery of its kind, researchers in France have found 19 asteroids in our solar system – between the planets Jupiter and Neptune – that they say are likely of interstellar origin.

Fuzzy blue ball with other lines on black background.

Update on 2I/Borisov, the first known interstellar comet

The first known interstellar comet – 21/Borisov – probably came here from a red dwarf star, according to a new study of data from the Hubble Space Telescope.

Two planets with radio waves between them and a star with a ring around it.

Will SETI 2.0 lead to a discovery of intelligent aliens?

2020 has been an exciting year so far for SETI – the search for extraterrestrial life – in terms of new technological developments and strategies.

These 2 outbound comets are likely from another solar system

Hyperbolic comets fly through our solar system at high speed before heading out to interstellar space, never to return. A new study from astronomers in Japan identifies 2 hyperbolic comets that likely originated outside our solar system.

Giant black hole in galaxy M87.

Top 9 EarthSky stories of 2019

From the 1st landing on the moon’s far side to the 1st actual image of a black hole, here’s a quick roundup of 9 of the stories our readers enjoyed most in 2019.

A bluish comet near a distant galaxy.

2nd-known interstellar visitor rounds the sun

The 1st interstellar object – 1I/’Oumuamua – had already passed closest to our sun when astronomers first spotted it. So catching this 2nd one – 2I/Borisov – prior to perihelion was a big plus for astronomers! Before and after images here.

Diagram of orbit and perihelion of 2nd interstellar object, Comet Borisov.

Interstellar object closest to the sun today

The fascinating object 2I/Borisov has been steadily brightening as it nears its encounter with our sun. It’ll pass closest to the sun on December 8, 2019, then flee again toward interstellar space.

Update on the 2nd interstellar visitor

Astronomers in Poland have just published the 1st peer-reviewed paper on the 2nd interstellar visitor, now officially labeled as a comet, 2I/Borisov. Plus check out the new Hubble Space Telescope image of this object.

IAU names the 2nd interstellar visitor

The first known interstellar visitor received the official name ‘Oumuamua, meaning ‘scout.’ This one has a less romantic name and one that sets a standard for future discoveries: 2I/Borisov.

Astronomers spy a 2nd interstellar visitor

Astronomers think the object they’ve labeled C/2019 Q4 – discovered August 30 – came from a place far, far away. If confirmed, it’s only the 2nd interstellar object ever detected, after ‘Oumuamua in 2017.

Stolen comets and free-floating objects

What happens when young stars brush past each other? A lot, according to a new study suggesting our solar system contains comets stolen from another star 4.5 billion years ago.


Did an interstellar traveler hit Earth in 2014?

‘Oumuamua – 1st known object to sweep past us from beyond our solar system – caused a stir when astronomers spotted it in 2017. Now a new study suggests another interstellar object might have hit the Earth in 2014.

Gaia reveals stars flying between galaxies

Only a small number of hypervelocity stars have ever been discovered. Now ESA’s Gaia mission has revealed 20 more.

Interstellar asteroid update: It’s a comet!

`Oumuamua is moving faster than expected on its way out of our solar system. Astronomers now think it’s really a comet, venting material from its surface that’s giving the object a small but steady push.

Meet our solar system’s 1st-known permanent immigrant

Mysterious asteroid 2015 BZ509 – currently nestling in Jupiter’s orbit – became less mysterious once astronomers realized it’s an immigrant, captured from another solar system.

Did Scholz’s star invade the Oort Cloud?

Scholz´s star – named for its discoverer – is now 20 light-years away. But astronomers say they’ve verified a flyby of this star 70,000 years ago that disturbed comets in the Oort Cloud.

Researchers say 1st interstellar asteroid likely from double star

New research suggests that the 1st confirmed interstellar asteroid – called ‘Oumuamua by astronomers – likely came from a system where 2 stars orbit each other.

Interstellar asteroid’s tumble suggests a violent past

The 1st known interstellar asteroid – ‘Oumuamua – is tumbling chaotically. A new study suggests its tumble resulted from a violent collision.

It’s the 1st known interstellar asteroid

It swept nearest the sun in September, then sped away again, back to interstellar space. Astronomers named it `Oumuamua. It’s dark red, very elongated and unlike anything in our solar system.