Thursday 18 August 2016

Venus-like exoplanet might have oxygen atmosphere, but not life

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The distant planet GJ 1132b intrigued astronomers when it was discovered last year. Located just 39 light-years from Earth, it might have an atmosphere despite being baked to a temperature of around 450 degrees Fahrenheit. But would that atmosphere be thick and soupy or thin and wispy? New research suggests the latter is much more likely.
via Science Daily
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Perseid Night at Yosemite

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The 2016 Perseid meteor shower performed well on the night of August 11/12. The sky on that memorable evening was recorded from a perch overlooking Yosemite Valley, planet Earth, in this scene composed of 25 separate images selected from an all-night set of sequential exposures. Each image contains a single meteor and was placed in alignment using the background stars. The digital manipulation accounts for the Earth's rotation throughout the night and allows the explosion of colorful trails to be viewed in perspective toward the shower's radiant in the constellation Perseus. The fading alpenglow gently lights the west face of El Capitan just after sunset. Just before sunrise, a faint band zodiacal light, or the false dawn, shines upward from the east, left of Half Dome at the valley's far horizon. Car lights illuminate the valley road. Of course, the image is filled with other celestial sights from that Perseid night, including the Milky Way and the Pleiades star cluster.
Tomorrow's picture: Meteor at Sunset Crater
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NASA prepares to launch first U.S. Asteroid sample return mission

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NASA is preparing to launch its first mission to return a sample of an asteroid to Earth. The mission will help scientists investigate how planets formed and how life began, as well as improve our understanding of asteroids that could impact Earth.
via Science Daily
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NASA asteroid redirect mission completes design milestone

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Following a key program review, NASA approved the Asteroid Redirect Mission (ARM) to proceed to the next phase of design and development for the mission's robotic segment. ARM is a two-part mission that will integrate robotic and crewed spacecraft operations in the proving ground of deep space to demonstrate key capabilities needed for NASA's journey to Mars.
via Science Daily
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How we escaped the Big Bang: New theory on moving through time

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A physicist is challenging the conventional view of space and time to show how the world advances through time. In her new research, she argues that T violation, or a violation of time reversal (T) symmetry, is forcing the universe and us in it, into the future.
via Science Daily
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