8
Dec 10

Japan's first Venus probe struggling to enter orbit

Source: AFP


Artist impression of the Akatsuki orbiting Venus.
Image credits: AFP/Akihiko Ikeshita.

Japan’s first Venus space probe encountered problems while attempting orbit insertion and went into safe mode. It took  about an hour and a half to regain communications with the probe after a 22 minute blackout with the Akatsuki spacecraft, and controllers seem to still be trying to ascertain the spacecraft’s orbit.

The Planet-C Venus Climate Orbiter, a box-shaped golden satellite fitted with two paddle-shaped solar panels, blasted off from a space centre in southern Japan in May. The probe, nicknamed "Akatsuki" or "Dawn", reversed its engine to slow down and enter the planet's gravitational field but lost contact with ground control longer than had been anticipated, the Japan Aerospace Exploration Agency (JAXA) said.

It was presumed to have shifted itself into a "safe hold mode", and was able to communicate only by via one of its three antennae after the blackout ended.

From translated Twitter reports and a document posted on the JAXA website, it appears engineers confirmed ignition of the thruster before Akatsuki moved behind Venus, but had trouble pinpointing the spacecraft after the blackout should have ended. They have regained some radio communications.

“It is not known which path the probe is following at the moment,” a JAXA official Munetaka Ueno told reporters at the ground control late Tuesday, according to AFP. “We are making maximum effort to readjust the probe.” (read more)

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8
Dec 10

New Zooniverse site: The Milky Way Project

Galaxy Zoo has launched a brand new site: The Milky Way Project (http://www.milkywayproject.org). The Milky Way Project aims to sort and measure our galaxy, the Milky Way. Their asking people to help find and draw bubbles in beautiful infrared data from the Spitzer Space Telescope. Understanding the cold, dusty material that can be seen in those images might help scientists to learn how stars form and how our galaxy changes and evolves with time.

As well as drawing out bubbles in our galaxy, they are also asking people to mark other objects such as star clusters, galaxies and ghostly red 'fuzzy' objects. People are invited to help to map star formation in the Galaxy.(read more)

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8
Dec 10

A Swarm of Ancient Stars

Source: ESO Photo Release eso1048


Globular cluster Messier 107, also known as NGC 6171, located about 21 000 light-years away in the constellation of Ophiuchus.
Image credit: ESO/ESO Imaging Survey

About 150 of the rich collections of old stars called globular clusters are known to orbit our galaxy, the Milky Way. This sharp new image of Messier 107, captured by the Wide Field Imager on the 2.2-meter telescope at ESO’s La Silla Observatory in Chile, displays the structure of one such globular cluster in exquisite detail. Studying these stellar swarms has revealed much about the history of our galaxy and how stars evolve. (read more)

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