Latest topics
» Holographic, Informational Reality
Today at 1:48 am by PurpleSkyz

» Strange Hole In Earth Sun Appears, Is It Hollow With A Planet Or Planets Within?
Today at 1:47 am by PurpleSkyz

» It fell from space and landed in a Walnut farm - Made it through the atmosphere!
Today at 1:43 am by PurpleSkyz

Today at 1:41 am by PurpleSkyz

» 'Red October' Astrological Forecast: Santos Bonacci with Violet Mae Brown
Today at 1:37 am by PurpleSkyz

» China To Launch Moon Simulator In 2020
Today at 1:31 am by PurpleSkyz

» Vaccine profiteer, Paul Offit, announces Trump’s child is autistic & laughs at a child who died after vaccine he invented
Today at 1:23 am by PurpleSkyz

» The dangers of blue light from digital devices: It can harm your eye health
Today at 1:16 am by PurpleSkyz

» System 001 is Deployed in The Great Pacific Garbage Patch
Today at 1:12 am by PurpleSkyz

» Incredible Footage Of An Object Orbiting The Moon
Today at 1:09 am by PurpleSkyz

» Max Igan - How The Matrix Controls You
Today at 1:07 am by PurpleSkyz

» Where is Q?
Today at 1:05 am by PurpleSkyz

» Earth Moving thru Haley's Comet Debris Trail
Today at 1:04 am by PurpleSkyz

» SerialBrain2's..... Why Trump Called Stormy "HORSEFACE"
Today at 1:03 am by PurpleSkyz

» Very bright meteor illuminates night sky over Hokkaido, Japan
Today at 1:00 am by PurpleSkyz

» #LIVE #QANON #LadyDragon - #Trump #MAGA #rally in #Mesa, #AZ @potus
Yesterday at 9:01 pm by LadyDragon

Yesterday at 7:54 pm by PurpleSkyz

» FUKUSHIMA Update 2018 (IT'S ALL DEAD!) | WatchmanReview
Yesterday at 1:24 pm by PurpleSkyz

» Bad-clown Rising - CAN YOU SAY THE FUTURE
Yesterday at 1:21 pm by PurpleSkyz

» Greg Hunter - Weekly News Wrap Up 10.19.18
Yesterday at 12:11 pm by PurpleSkyz

» Khashoggi Assassination Exposed
Yesterday at 11:12 am by PurpleSkyz

» Antarctica: Unknown base 12.5 miles from Novolazarevskaya Station
Yesterday at 10:57 am by PurpleSkyz




No automatic alt text available.
Featuring Homemade Herbal Salves Made in the Ozarks


Oily Rocks Essentials
Oily Rocks
Boutique Essential Oil
Roller Bottles


Key Word Topics:
11:11, Aliens, Angels, Antarctica, Ascension, Assange, Astral Projection, Auras, Bankers, Bitcoin, Blood Type, Booms, BRICS, Cabal, Cannabis, CBD, CERN, Chemtrails, CME's, Consciousness, Conspiracy Theories, Crypto Currency, Crystals, Dinar, Dinar Scam, Disclosure, Earthquakes, EMF, Empaths, Environment, ESP, ET's, False Flags, Federal Reserve, Flooding, Fluoride, Fracking, Fraud, Fukushima,GMO's, Herbs, History, Holistic, Illuminati, IMF, ISS, Ley Lines, Lucid Dreaming, Mandela Effect, Medical, Meteor, MKUltra, Monsanto, Morgellons, NASA, Nature, Nesara, Nibiru, Night Sky, NDE's, Numerology, NWO, OD's, Organic, Paranormal, Pizzagate, Planet X, Predictive Programming, Protests, Psychic, Q Anon, Radiation, Reincarnation, Remote Viewing, RH Negative Blood, RV, Sacred Geometry, Scams, Science, SETI, Shadow People, Shift, Sink Holes, Smart Meters, Space Force, Space X, Spirit Animals, Sun Simulator, Synchronicity, Technology, TDA, THC, UFO, Vatican, Vaccines, Volcano, WIFI, Wikileaks

You are not connected. Please login or register

Out Of Mind » SOLAR & PLANETARY ALERTS & INFO » NIGHT SKY GUIDE » Gaia’s 2nd data release: 1.7 billion stars!

Gaia’s 2nd data release: 1.7 billion stars!

Go down  Message [Page 1 of 1]

1 Gaia’s 2nd data release: 1.7 billion stars! on Thu Apr 26, 2018 8:48 am



Gaia’s 2nd data release: 1.7 billion stars!

By Deborah Byrd in Space | April 26, 2018

Why did ESA’s director of science say Gaia’s observations are “redefining the foundations” of astronomy? Also, links to virtual reality resources made possible by Gaia, available for you to explore.

Gaia’s view of our home galaxy, the Milky Way, in a 360 degree interactive view (click arrows in upper left) via ESA/Gaia/DPAC; ATG medialab.
It was less than a century ago, in 1920, that astronomers were famously debating the nature of so-called spiral nebulae. Some believed they lay inside our own Milky Way galaxy and were, perhaps, forming solar systems. Others thought they were large and distant separate galaxies. Thus the wisest astronomers of yesteryear couldn’t be sure of the true nature of our home galaxy, the Milky Way. They couldn’t know it is indeed one galaxy of billions in the universe. And they couldn’t have imagined that now, just 100 years later, we’d have a space observatory like Gaia, whose goal is nothing less than to provide a 3D map of our galaxy. This mission had its second data release this week, along with a host of virtual reality resources for scientists and the public. The European Space Agency (ESA) said Gaia’s data makes possible:
… the richest star catalog to date, including high-precision measurements of nearly 1.7 billion stars and revealing previously unseen details of our home galaxy.
The new data, which ESA called phenomenal, is based on 22 months of Gaia’s charting of the sky. Günther Hasinger, ESA’s director of science, said:
The observations collected by Gaia are redefining the foundations of astronomy.
Why all the superlatives? What’s so amazing about Gaia’s data?
Gaia gathers its phenomenal data in the most unglamorous of ways, via what’s called astrometry. Okay, now, hang in there with me. Think about this. Gaia’s job is to scan the sky repeatedly, observing each of its targeted billion stars an average of 70 times over its five-year mission. So, for example, we know our sun and all the stars in the Milky Way are moving continuously in great orderly masses around the center of our galaxy. We know that … but we didn’t have many details about how each star moves. How could we? The data for so many stars would be (are) massive; collecting the data, storing it and analyzing it requires today’s spacecraft and computer technologies.
Over its five years, again and again and again, Gaia will acquire data points on the positions of Milky Way stars. Thus astronomers have already been able to produce an illustration like the very wonderful one below, which shows median velocities (the distances and directions traveled by each star per unit of time) of stars in our Milky Way.
And so we begin to see – not just see in our minds, but actually see via Gaia’s actual data – that, due to the movements of its stars, our Milky Way galaxy is rotating, with us in its midst. You can see that in one illustration of Gaia’s data, below:

All-sky map of median velocities of about a billion stars toward or away from our sun, made possible by the Gaia mission. When you look at this map, you’re seeing a large-scale pattern caused by rotation of our Milky Way galaxy. Image via DPAC/ESA/STFC.
And that’s just one example of the type of insight Gaia’s data can provide. ESA said:
Gaia was launched in December 2013 and started science operations the following year. The first data release, based on just over one year of observations, was published in 2016; it contained distances and motions of two million stars.
The new data release, which covers the period between July 25, 2014, and May 23, 2016, pins down the positions of nearly 1.7 billion stars, and with a much greater precision. For some of the brightest stars in the survey, the level of precision equates to Earth-bound observers being able to spot a Euro coin lying on the surface of the moon.
Gaia is also gathering other types of data. The illustration below shows some of the ways in which Gaia sees our Milky Way:

Gaia’s all-sky view of our Milky Way galaxy and neighboring galaxies. The maps show the total brightness and color of stars (top), the total density of stars (middle) and the interstellar dust that fills the galaxy (bottom). These images are based on observations performed by the ESA satellite in each portion of the sky between July 2014 and May 2016, which were published as part of the Gaia second data release on April 25, 2018. Image via ESA.
Virtual Reality Resources. Also, along with this second data release by Gaia, ESA has released several virtual reality resources to help visualize Gaia’s extraordinary data set, both for public outreach and for scientific purposes.
One of the public offerings is Gaia Sky, a real-time, 3D astronomy visualisation software that runs on Windows, Linux and MacOS, developed in the framework of ESA’s Gaia mission by the Gaia group at the Astronomisches Rechen-Institut (Zentrum für Astronomie Heidelberg, University of Heidelberg, Germany). It contains a simulation of our solar system, a view of the second Gaia data release (with different selections based on parallax relative errors, ranging from a few million to hundreds of millions of stars), and additional astronomical and cosmological data to visualize star clusters, nearby galaxies, distant galaxies and quasars, and the Cosmic Microwave Background. The data are extensive, and you’ll want to explore them yourself here. ESA also offered this fun trailer for Gaia Sky:

Screen shot from Gaia Sky, a real-time, 3D astronomy visualization software that runs on Windows, Linux and MacOS.
So you can see … there’s really a lot here to think about and explore, both for the public and for scientists. And maybe you can begin to see that – to those astronomers debating the nature of spiral nebulae in 1920 – Gaia’s data might have seemed nothing short of miraculous!
The video below shows a comparison between Gaia’s first and second data releases:

View larger. | Gaia liftoff on December 19, 2013.
Bottom line: The Gaia space observatory’s mission is to create a 3D map of our Milky Way galaxy. This week was its 2nd data release, consisting of high-precision measurements of some 1.7 billion stars. ESA also released a host of virtual reality resources, based on Gaia data.
Click here for Gaia data release 2 virtual reality resources


Thanks to:


Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum