Archive for the ‘Astronomy’ Category

12 New Moons Orbiting Jupiter – One On Collision Course


(Guardian Space) – Ian Sample:

A head-on collision between two Jovian moons would create a crash so large it would be visible from Earth. …

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Jupiter's outer moons


The Cosmic Ocean


(Planetary Blogs) – Adam Block:

I don’t know why, but I never tire of spiral galaxies and their grand sweeping displays. …

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NGC 1398

Staring Down The Barrel Of A Black Hole


(Discover Blogs::The Crux) – Erika K. Carlson:

Researchers announced that they’d caught a single, tiny, high-energy particle called a neutrino that had rained down on Earth from a supermassive black hole some 4 billion light-years away.

Astrophysicists are excited because this is only the third identified cosmic object they’ve managed to collect the elusive particles from — first the Sun, then a supernova that went off in a neighboring galaxy in 1987, and now a blazar.

So, what is a blazar, anyway? …

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Centaurus A, by Chandra

Solar System Travel Spots


(Discover Blogs::The Crux) – John Wenz:

The reality of what awaits you beyond Earth is far more dangerous than the TV series The Expanse. Even if you make it past the interplanetary radiation, you’re still confronted with any number of hazards, and they don’t stop once you land.

Here are a few places from your colonization dreams that might end up actual nightmares. …

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The Expanse

How Do We Know The Age Of The Solar System?


(Starts With A Bang!) – Ethan Siegel:

We’ve all heard the number: 4.5 billion years. But how do we know, and how certain are we that the Earth and Sun are the same age? …

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Early Solar System

Rocket Plume Shadow Points to the Moon


(APoD) – In early 2001 during a launch of Atlantis, the Sun, Earth, Moon, and rocket were all properly aligned for this photogenic coincidence. …


STS 98 plume

VIMOS’s Last Embrace


(ESO PoTW) – Two spiral galaxies are locked in a spellbinding, swirling dance in this image from the VIMOS instrument on ESO’s Very Large Telescope (VLT). The two interacting galaxies — NGC 5426 and NGC 5427 — together form an intriguing astronomical object named Arp 271, the subject of this, the final image captured by VIMOS before it was decommissioned on 24 March 2018. …

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Arp 271

Where Does 2015 BZ509 Come From?


(Syfy Wire::Bad Astronomy) – Phil Plait:

2015 BZ509 may indeed be an interstellar asteroid.

The problem here is that I don’t think the astronomers eliminated every possible reason this asteroid could be in its bizarre orbit. That’s a nearly impossible task, of course (it’s a black swan situation), but even so, there are some likely scenarios. …

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Asteroid 433 Eros

The First Interstellar Immigrant


(Independent Science) – Andrew Griffin:

Asteroid (514107) 2015 BZ509 is currently in orbit around Jupiter. It was always known to be a bizarre object, and scientists have finally found why: because it didn’t begin life here.

In our solar system, all of the planets and most of the rest of the objects move around the Sun in the same direction. But the alien rock moves the opposite way. …

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Orbit of asteroid 2015 BZ509

The Ring Is A Lie: Messier 57


(Starts With A Bang!) – Ethan Siegel:

The Ring Nebula, one of the night sky’s most famous sights isn’t what it appears to be. …

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Ring Nebula (Messier 57)