位置天文学衛星Gaiaのデータが公開

ESA Science @esascience

F.Jansen: For brightest stars, @ESAGaia will determine positions w/ precision of ~10 micro arcseconds = size of a coin on the moon #GaiaDR1

ESA Science @esascience

F.Jansen now describing the billion pixel focal plane camera at the heart of @ESAGaia. Here's how it works: youtu.be/bbfb8VhH7L0 #GaiaDR1

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ESA Science @esascience

F.Jansen: Some @ESAGaia challenges: v.stable angle b/w the 2telescopes; highly precise timing; knowing spacecraft position to ~100m #GaiaDR1

ESA Science @esascience

F.Jansen: @ESAGaia produces a very high data rate/volume: about 40Gbyte per day! #GaiaDR1

ESA Science @esascience

F.Jansen: #GaiaDR1 is only the beginning. More data, increasingly more accurate and for more stars will become available over coming years

ESA Science @esascience

F.Jansen: I'm extremely happy about the #GaiaDR1 today but I am even more looking forward to the future releases!

ESA Science @esascience

Now on stage Timo Prusti, @ESAGaia Project Scientist: How and why we're making the most precise map of our Galaxy #GaiaDR1

ESA Science @esascience

T.Prusti: We're inside our Milky Way Galaxy & studying its structure is complicated sci.esa.int/gaia/58206 #GaiaDR1 pic.twitter.com/OUGoVF5gEc

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ESA Science @esascience

T.Prusti: >20 years ago, @ESAGaia's predecessor #Hipparcos charted 3d positions of ~120,000 stars – but only in solar neighbourhood #GaiaDR1

ESA Science @esascience

T.Prusti: With @ESAGaia, we will reach much, much farther than #Hipparcos, probing stars across the Galaxy: youtu.be/G5AdrupH788 #GaiaDR1

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ESA Science @esascience

T.Prusti: We are on track to unravel structure and formation history of our Galaxy. Can't wait to share #GaiaDR1 data today at 12:30CEST!

ESA Science @esascience

Now it's the turn of Anthony Brown from @UniLeiden, Chair of @ESAGaia Data Processing and Analysis Consortium #DPAC Executive #GaiaDR1

ESA Science @esascience

A.Brown: ~450 scientists & software engineers are in @ESAGaia Data Processing & Analysis Consortium: sci.esa.int/gaia/58175 #GaiaDR1 #DPAC

ESA Science @esascience

A.Brown: #DPAC involves 6 data processing centres + 160 institutes (in 24 countries + @esa) to produce @ESAGaia catalogue #GaiaDR1

ESA Science @esascience

A.Brown: #GaiaDR1 contains an atlas of 1billion stars + a 3D motion picture of 2million stars in our neighbourhood + data for variable stars

ESA Science @esascience

#GaiaDR1 details: 1billion stars w/ position+magnitude; 2million stars w/ pos+mag+parallax+proper motion; 3194 variable stars; 2152 quasars

ESA Science @esascience

A.Brown: All-sky map from 1st year of observations @ESAGaia has been collecting outstanding data #GaiaDR1

ESA Science @esascience

Here a low-res sneak preview of #GaiaDR1 all-sky map! Stay tuned for full resolution image to be published 12:30CEST pic.twitter.com/Q21fb6oVSJ

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ESA Science @esascience

A.Brown: The plane of our Milky Way Galaxy stands out in @ESAGaia's new all-sky image + profile of dark clouds of gas & dust #GaiaDR1

ESA Science @esascience

A.Brown: All-sky map is work in progress! Artefacts caused by sky-scanning procedure, which is not yet homogeneous. Will disappear. #GaiaDR1

ESA Science @esascience

A.Brown: Many open & globular clusters + nearby galaxies in @ESAGaia's all-sky map. High-res will be available shortly to explore #GaiaDR1

ESA Science @esascience

A.Brown: Hertzsprung-Russell diagram (astronomers' tool to study physics of stars) shows @ESAGaia distance estimates are reliable #GaiaDR1

ESA Science @esascience

A.Brown: #Hipparcos had only 60,000 stars w/ parallax precision 20%. @ESAGaia now has 1million &many more will come in future years #GaiaDR1

ESA Science @esascience

A.Brown: A major advance in the mapping of the heavens! Documentation + series of @AandA_journal papers will be available shortly #GaiaDR1

ESA Science @esascience

Now Antonella Vallenari, @ESAGaia #DPAC #INAF & Astronomical Observatory of Padua, presenting the view of nearby star clusters with #GaiaDR1