yorksranter + astronomy   90

No, 'Oumuamua is not an alien spaceship. It might be even weirder. | SYFY WIRE
Materials made in a fractal pattern can be very porous, and in fact out in that protoplanetary disk around a young star, physical models show that objects can grow fractally until they're as big as ‘Oumuamua, and have those extremely low densities needed to account for its weird behavior.
oumuamua  space  astronomy  science  snowflake 
february 2019 by yorksranter
The 26,000-Year Astronomical Monument Hidden in Plain Sight
By combining planet locations with the angle of precession, we are able to pinpoint the time of the dam’s completion down to within a day.
astronomy  clocks  hooverdam 
february 2019 by yorksranter
Astronomers Spot Potential "Interstellar" Asteroid Orbiting Backward around the Sun - Scientific American
Certainty about BZ509’s origins can only come from follow-up studies. This would specifically entail searches for additional interstellar interlopers, which Namouni and Morais predict should pile up in orbits roughly perpendicular to the plane in which the known planets orbit the sun. Then, Morais says, “it would be very interesting to analyze the composition of this object and other immigrant candidates,” to seek out chemical signatures of their births around alien suns and subsequent journeys through the spaces between the stars.
oumuamua  space  astronomy 
may 2018 by yorksranter
Exoplanet Exploration: Planets Beyond our Solar System: What in the world is an ‘exoplanet?’
A planet now known as Tadmor was detected in 1988, though the discovery was withdrawn in 1992. Ten years later, more and better data showed definitively that it was really there after all.
exoplanet  astronomy 
april 2018 by yorksranter
Paucity of phosphorus hints at precarious path for extraterrestrial life | EurekAlert! Science News
If phosphorus is sourced from supernovae, and then travels across space in meteoritic rocks, I'm wondering if a young planet could find itself lacking in reactive phosphorus because of where it was born? That is, it started off near the wrong kind of supernova? In that case, life might really struggle to get started out of phosphorus-poor chemistry, on another world otherwise similar to our own."
phosphorus  greatfilter  supernova  astronomy 
april 2018 by yorksranter
The “Wow!” Signal – The Center for Planetary Science
The results of this investigation, therefore, conclude that cometary spectra are detectable at 1420 MHz and, more importantly, that the 1977 “Wow!” Signal was a natural phenomenon from a Solar System body.
wowsignal  space  astronomy 
june 2017 by yorksranter
astro tales : Dynamics of Cats
Canada's silent integration into Europe continues
canada  science  astronomy 
june 2011 by yorksranter
james_nicoll: Interesting but vague
1900 GMT on NASA TV. Key points: Titan, arsenic, Cassini, telescopes, Lake Mono. Hella sfnal.
science  astronomy  life  arsenic  biochemistry  Titan  Cassini  space 
december 2010 by yorksranter
Pope's astronomer says he would baptise an alien if it asked him | Science | The Guardian
"No matter how many tentacles it has..." O.vulgaris is already the only invertebrate with legal rights. A soul?
astronomy  Catholic  pope  religion  science  aliens  octopus 
september 2010 by yorksranter
Dogon - SkepticWiki
"The Dogons had been in contact with an advanced alien civilisation - France"
sceptic  astronomy 
july 2009 by yorksranter
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