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Gaia spacecraft maps 14,000 asteroids

Astronomy Magazine - Thu, 05/02/2019 - 04:00
The European Space Agency’s Gaia spacecraft is on a mission to map a billion stars. But as it stares out into space, it also spies a lot of closer objects. The newly released image above shows the orbits of 14,000 asteroids that it mapped during its first two years of observing. Most of those objects were known about from previous surveys. But three objects are new, those ones are picked out in gray in Gaia’s image. The few dozen yellow tracks show asteroids that are considered near-
Categories: Astronomy

Asteroids delivered half of Earth's water, new sample suggests

Astronomy Magazine - Wed, 05/01/2019 - 04:00
New analysis of grains from asteroid Itokawa, returned by Hayabusa in 2010, suggest our planet may have gotten a significant portion of its liquid from such bodies.
Categories: Astronomy

Surprise 4,000-mile ‘ice corridor’ found on Saturn’s moon Titan

Astronomy Magazine - Tue, 04/30/2019 - 04:00
Planetary scientists used a new analysis tool to spot a band of water ice stretching almost halfway around the circumference of the chilly world.
Categories: Astronomy

Sirius says goodbye to the evening sky

Astronomy Magazine - Tue, 04/30/2019 - 04:00

The night sky's brightest star dips into twilight. 

Categories: Astronomy

Comet Halley begins showering Earth with Eta Aquariid meteors

Astronomy Magazine - Mon, 04/29/2019 - 04:00

Although the comet itself is still far from Earth, eons's worth of its ejected debris will lead to one of this year's best meteor showers.

Categories: Astronomy

Astronomers watch as a black hole's jet wobbles like a top

Astronomy Magazine - Mon, 04/29/2019 - 04:00
Thanks to a misalignment between the black hole's spin and its swirling disk of material, the black hole's jets trace out a cone shape in space.
Categories: Astronomy

Scientists use LHC to hunt dark matter siblings

Astronomy Magazine - Mon, 04/29/2019 - 04:00
Dark matter is elusive. That has some scientists searching for its sister dark particles, which may belong to a much larger theoretical "dark world."
Categories: Astronomy

Magma ocean might have covered Earth before Moon-forming impact

Astronomy Magazine - Mon, 04/29/2019 - 04:00
Scientists think a molten Earth could explain why the Moon doesn't appear to contain the chemical fingerprints of a theorized Moon-forming impactor named Theia.
Categories: Astronomy

The Sky This Week from April 26 to May 5

Astronomy Magazine - Fri, 04/26/2019 - 04:00
The Summer Triangle returns to prominence before midnight this week, while Mars passes in front of the open star cluster NGC 1746 in Taurus the evening of April 26.
Categories: Astronomy

Hubble hints today's universe expands faster than it did in the past

Astronomy Magazine - Fri, 04/26/2019 - 04:00
The universe is currently expanding 9% faster than the early universe, which is forcing astronomers to reconsider some fundamental aspects of the cosmos.
Categories: Astronomy

Robot Astrobees Honey and Bumble report for duty on the ISS

Astronomy Magazine - Fri, 04/26/2019 - 04:00
These cube-shaped robots will aid astronauts with a variety of tasks and serve as robotic research stations in space.
Categories: Astronomy

LIGO spots two gravitational waves in just two days

Astronomy Magazine - Fri, 04/26/2019 - 04:00
In the few weeks since LIGO kicked off its third observing run, it’s also already detected three potential black hole collisions and a neutron star merger, bringing its total lifetime gravitational wave haul to 14.
Categories: Astronomy

LIGO detects gravitational waves from another neutron star merger

Astronomy Magazine - Fri, 04/26/2019 - 04:00
Early in the morning of April 25, astronomers at LIGO and Virgo caught gravitational waves from two merging neutron stars, just the second such detection.
Categories: Astronomy

Cosmic conundrum: Just how fast is the universe expanding?

Astronomy Magazine - Thu, 04/25/2019 - 04:00
Astronomers have found two different values for the expansion rate of the universe. But they can't both be right.
Categories: Astronomy

‘It’s a haunting thing’: Space artists on the first black hole image

Astronomy Magazine - Thu, 04/25/2019 - 04:00
For the first time, humanity has glimpsed a black hole. For those who have drawn them for decades, it's a big moment.
Categories: Astronomy

Japan’s Hayabusa2 spacecraft shoots asteroid, returns to crime scene

Astronomy Magazine - Thu, 04/25/2019 - 04:00
Hayabusa2 sent back images of the hole it blew into asteroid Ryugu earlier this month, revealing a much larger crater than expected.
Categories: Astronomy

‘Speed bumps’ from auroras can slow down satellites

Astronomy Magazine - Wed, 04/24/2019 - 04:00

A rocket mission flew into the northern lights high above Earth to see how the dancing streams of light are dragging down satellites.

Categories: Astronomy

Planetary tours: The backpacker's guide to the solar system

Astronomy Magazine - Tue, 04/23/2019 - 04:00

Grab a spacesuit and a few months of provisions. We’re taking you on a tour of the Interplanetary Parks Service.

Categories: Astronomy

Crew Dragon test mishap could delay first SpaceX human flight

Astronomy Magazine - Mon, 04/22/2019 - 04:00
Dramatic smoke plumes rose from the Florida launchpad on Saturday, but SpaceX has kept quiet on details so far.
Categories: Astronomy

NASA astronauts will ride Russian rockets for another year

Astronomy Magazine - Mon, 04/22/2019 - 04:00
Thanks to delays in commercial launches, NASA will continue to rely on Russian Soyuz flights to send astronauts to the space station through early 2020. 
Categories: Astronomy

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