Thursday 3 March 2016

The secret to 3-D graphene? Just freeze it

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Engineers have used a modified 3-D printer and frozen water to create three-dimensional objects made of graphene oxide. The structures could be an important step toward making graphene commercially viable in electronics, medical diagnostic devices and other industries.
via Science Daily

Hubble breaks cosmic distance record: Sees universe soon after Big Bang

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By pushing the NASA/ESA Hubble Space Telescope to its limits astronomers have shattered the cosmic distance record by measuring the distance to the most remote galaxy ever seen in the Universe. This galaxy existed just 400 million years after the Big Bang and provides new insights into the first generation of galaxies.
via Science Daily
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Hubble Team Breaks Cosmic Distance Record


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NASA's Hubble Space Telescope is an amazing time machine; by looking back through space, astronomers actually look back through time. Now, by pushing Hubble to its limits, an international team of astronomers has shattered the cosmic distance record by viewing the farthest galaxy ever seen. Named GN-z11, this surprisingly bright, infant galaxy is seen as it was 13.4 billion years in the past. The astronomers saw it as it existed just 400 million years after the big bang, when the universe was only three percent of its current age. At a spectroscopically confirmed redshift of 11.1, the galaxy is even farther away than originally thought. It existed only 200 million to 300 million years after the time when scientists believe the very first stars started to form. At a billion solar masses, it is producing stars surprisingly quickly for such an early time. This new record will most likely stand until the launch of Hubble's successor, the James Webb Space Telescope, which will look even deeper into the universe for early galaxies.

To learn even more about galaxy GN-z11, join a live Hubble Hangout discussion with astronomers and scientists at 3:00 p.m. EST on Thurs., March 3, at http://hbbl.us/y6H.


via HubbleSite NewsCenter -- Latest News Releases
http://hubblesite.org/newscenter/archive/releases/2016/07/

Encapsulating ExoMars

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The ExoMars 2016 spacecraft are now sealed inside the rocket fairing ahead of launch on 14 March
via ESA Space Science
http://exploration.esa.int/mars/57517-exomars-2016-spacecraft-encapsulated-within-launcher-fairing/

Moons and Jupiter

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Some of the Solar System's largest moons rose together on February 23. On that night, a twilight pairing of a waning gibbous Moon and Jupiter was captured in this sharp telescopic field of view. The composite of short and long exposures reveals the familiar face of our fair planet's own large natural satellite, along with a line up of the ruling gas giant's four Galilean moons. Left to right, the tiny pinpricks of light are Callisto, Io, Ganymede, [Jupiter], and Europa. Closer and brighter, our own natural satellite appears to loom large. But Callisto, Io, and Ganymede are actually larger than Earth's Moon, while water world Europa is only slightly smaller. In fact, of the Solar System's six largest planetary satellites, only Saturn's moon Titan is missing from the scene.

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Using graphene to fight bacteria

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Scientists are studying graphene oxide in the hopes of one day creating bacteria-killing catheters and medical devices. Coating surgical tools with this carbon-based compound could kill bacteria, reducing the need for antibiotics, decreasing the rates of post-operative infections and speeding recovery times.
via Science Daily