Search results for oort cloud

Space Exploration Feb 4, 2016

The long hunt for new objects in our expanding solar system

Recognise these planet names: Vulcan, Neptune, Pluto, Nemesis, Tyche and Planet X? They all have one thing in common: their existence was predicted to account for unexplained phenomena in our solar system.

Astronomy Jan 26, 2016

Space-earth system produces highest-resolution astronomical image

Using an orbiting radio-astronomy satellite combined with 15 ground-based radio telescopes, astronomers have made the highest-resolution, or most-detailed, astronomical image yet, revealing new insights about a gorging black ...

Space Exploration Jan 25, 2016

Claims about new planets that turned out to be wrong—and why 'Planet Nine' may be different

There's a real buzz among planetary scientists after a new study suggested that an unseen planet, dubbed "Planet Nine", of about ten times the Earth's mass could be lurking in the Kuiper belt, a band of icy objects beyond ...

Astronomy Dec 18, 2015

What is the Big Bang Theory?

How was our Universe created? How did it come to be the seemingly infinite place we know of today? And what will become of it, ages from now? These are the questions that have been puzzling philosophers and scholars since ...

Astronomy Dec 11, 2015

Did 'dark matter' or a star called Nemesis kill the dinosaurs?

The dinosaur extinction 66m years ago was most likely caused by a comet or big asteroid hitting the Earth. But given that asteroids don't actually hit our planet very often, could this really be the whole story? Many scientists ...

Space Exploration Dec 10, 2015

Could molecular oxygen be common on comets?

(Phys.org)—A team of researchers, encouraged by the latest discovery of ESA's Rosetta spacecraft of molecular oxygen (O2) on the comet 67P/Churyumov-Gerasimenko, are going over comet 1P/Halley (known as Halley's Comet) with ...

General Physics Oct 27, 2015

Physicist links dark matter to dinosaur extinction in new book

Dark matter: The world's brightest physicists know it's there, but can't say for sure what it is.

Earth Sciences Oct 20, 2015

Scientists find link between comet and asteroid showers and mass extinctions

Mass extinctions occurring over the past 260 million years were likely caused by comet and asteroid showers, scientists conclude in a new study published in Monthly Notices of the Royal Astronomical Society.

Space Exploration Oct 13, 2015

Interview with Paul Weissman of the Rosetta comet rendezvous mission

Rosetta, named for the inscribed stone that allowed 19th-century historians to unlock the secrets of ancient Egypt, is unlocking the secrets of a far more ancient comet. Rosetta team member Paul Weissman discusses the mission.

Space Exploration Oct 6, 2015

Is Jupiter our friend or enemy?

Does Jupiter protect us from harm, or cause more objects to change trajectory and head towards Earth?

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