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August 12 2016

"The signal"
by "Pale Red Dot - A search for Earth-like planets around Proxima Centaury"

"So while we are convinced there is a signal in the Doppler measurements of Proxima, previous data do not allow to confirm its presence and clarify its origin. The long term variability of Proxima spoiled our attempts to combine data from previous observations so we needed a dedicated campaign. Combination of UVES and HARPS data at different cadences suggest that the star is showing a smoothly varying Doppler signal. Since the UVES survey set an upper limit between 2-3 Earth masses and if the signal is not activity induced, it must correspond to a planet smaller than that (between 1-2 Earth masses). The signal might well be caused by stellar activity, which should be quasi-periodic as opposed to the strict periodicity of the orbital motion of a putative planet. [...]"
Reposted fromArchimedes Archimedes
Formation of diverse ring-satellite systems around Centaurs through tidal disruption ... http://arxiv.org/abs/1608.03509 
Reposted byp856 p856

July 24 2016

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Reposted fromscience science viasergelanmi sergelanmi
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Reposted fromscience science viasergelanmi sergelanmi
"What the world’s oldest calculator tells us about the ancient Greeks' view of the universe", by Mike Edmunds, The Conversation, 20 July 2016
Reposted fromArchimedes Archimedes

July 23 2016

July 22 2016

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Our Place in the Cosmos
Reposted fromalexandersmith8805 alexandersmith8805

July 20 2016

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orion trail
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Jupiter "from the bottom"
Reposted fromoopsiak oopsiak

July 19 2016

Play fullscreen
Childrens cartoon about Rosetta mission. So cute ^( * - * )^

watch entire series: https://www.youtube.com/watch?list=PLgx5PMpgonqUD1aO3g0bZ_a7VKg8VGTeS&v=trljrwTbr4w
Reposted fromunique-entity unique-entity

July 10 2016

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Reposted fromscience science viasergelanmi sergelanmi

July 05 2016

Reposted fromscience science viapuszka puszka

June 29 2016

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Relative Likelihood for Life as a Function of Cosmic Time
by Abraham Loeb, Rafael A. Batista, David Sloan
http://arxiv.org/abs/1606.08448 (27 Jun 2016)

Is life most likely to emerge at the present cosmic time near a star like the Sun? We address this question by calculating the relative formation probability per unit time of habitable Earth-like planets within a fixed comoving volume of the Universe, dP(t)/dt, starting from the first stars and continuing to the distant cosmic future. We conservatively restrict our attention to the context of "life as we know it" and the standard cosmological model, LCDM. We find that unless habitability around low mass stars is suppressed, life is most likely to exist near 0.1 solar-mass stars ten trillion years from now . Spectroscopic searches for biosignatures in the atmospheres of transiting Earth-mass planets around low mass stars will determine whether present-day life is indeed premature or typical from a cosmic perspective.
Reposted fromArchimedes Archimedes

June 21 2016

June 17 2016

Play fullscreen
Asteroid 2016 HO3 - Earth's Constant Companion

A small asteroid has been discovered in an orbit around the sun that keeps it as a constant companion of Earth, and it will remain so for centuries to come. Full story at http://go.nasa.gov/1UdQoAF

June 16 2016

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