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Star birth with a chance of Winds?

Science Daily: Comets and Asteroids -

The lesser-known constellation of Canes Venatici (The Hunting Dogs), is home to a variety of deep-sky objects -- including this beautiful galaxy, known as NGC 4861. Astronomers are still debating on how to classify it. While its physical properties -- such as mass, size and rotational velocity -- indicate it to be a spiral galaxy, its appearance looks more like a comet with its dense, luminous 'head' and dimmer 'tail' trailing off. Features more fitting with a dwarf irregular galaxy.

January 1986 - Voyager 2 Flyby of Miranda

NASA: Image of the Day -

Uranus' moon Miranda is shown in a computer-assembled mosaic of images obtained Jan. 24, 1986, by the Voyager 2 spacecraft. Miranda is the innermost and smallest of the five major Uranian satellites, just 480 kilometers (about 300 miles) in diameter. Nine images were combined to obtain this full-disc, south-polar view.

Urban collection of modern-day micrometeorites

Science Daily: Comets and Asteroids -

More than 100 billion micrometeorites (MMs) fall to Earth each year. Until now, scientists have believed that these particles could only be found in the cleanest environments, such as the Antarctic. Now they show that, contrary to that expectation, micrometeorites can be recovered from city rooftops and that, unlike those from the Antarctic, they are the youngest collected to date.

Bursts of methane may have warmed early Mars

Science Daily: Mars -

The presence of water on ancient Mars is a paradox. There's plenty of geographical evidence that rivers periodically flowed across the planet's surface yet Mars should have been too cold to support liquid water at that time. Now, researchers suggest that early Mars may have been warmed intermittently by a powerful greenhouse effect. They found interactions between methane, carbon dioxide and hydrogen in the early Martian atmosphere may have created warm periods when the planet could support liquid water on the surface.

Micro spacecraft investigates cometary water mystery

Science Daily: Comets and Asteroids -

In September 2015, a team of astronomers successfully observed the entire hydrogen coma of the comet 67P/Churyumov-Gerasimenko, using the LAICA telescope onboard the PROCYON spacecraft. They also succeeded in obtaining the absolute rate of water discharge from the comet. Through our observations, we were able to test the coma models for the comet for the first time. This result is the first scientific achievement by a micro spacecraft for deep space exploration.


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