Gaia Spreads Its Wings | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 02.23.15

Airborne 02.24.15

Airborne 02.25.15

Airborne 02.26.15

Airborne 02.20.15

Airborne Hi-Def On YouTube

Airborne 02.23.15

Airborne 02.24.15

Airborne 02.25.15

Airborne 02.26.15

Airborne 02.20.15

Mon, Dec 12, 2011

Gaia Spreads Its Wings

European Probe's Sun Shield Deployed For The First Time

ESA's Gaia star-mapper has passed a critical test ahead of its launch in 2013: the spacecraft's sunshield has been deployed for the first time. Gaia's sunshield is an essential component of the mission. It keeps Gaia in shadow, maintaining the scientific instruments at a constant temperature of around -110 degrees centigrade.

ESA Photo

The sunshield is about 10 m across, which is too large for the launch vehicle fairing, so it has been built with a dozen folding panels that will be deployed after launch. Since the sunshield is designed for the weightlessness of space, it cannot support its own weight on Earth. So, during this test at Astrium in Toulouse, France, support cables and counterweights simulated weightless conditions and provided a realistic trial.

During its expected lifetime of five years, Gaia will take a census of a billion stars - roughly 1% of all of the stars in our Galaxy. It will observe each star about 70 times, each time recording its brightness, colour and, most importantly, its position. By comparing Gaia's series of exquisite observations, astronomers will precisely measure the apparent movement of each star across the heavens, enabling them to determine its distance and true motion through space. The unprecedented results will allow astronomers to trace the history of the Milky Way.

Before the 2013 launch, some of the solar array panels needed to generate power will be fixed to the sunshield. The rest will be placed on the bottom of the spacecraft.

FMI: www.esa.int

Advertisement

More News

ANN Is Hiring! Videographers Needed For Airborne Unlimited Program Staff

Videographer/Reporters Needed For Airborne Unlimited Program Expansion Aero-News and Airborne are expanding--and innovating! And we're seeking additional on-air video journalist(s)>[...]

Airborne 02.26.15: NBAA v Santa Monica, F22 Airshow Sked, Google Lunar XPrize

Also: Pioneering Space, IMC Clubs, BizJet Forecast, R44 SAIB, Twin Otter Upgrade, Cecil Field's Naval Influx The saga of Santa Monica Airport in California continues as the NBAA ha>[...]

ANN's Daily Aero-Linx (02.27.15)

National Association of Rocketry The NAR is all about having fun and learning more with and about sport rockets.>[...]

ANN's Daily Aero-Term (02.27.15): Propeller/Rotor Modulation Error

Certain propeller RPM settings or helicopter rotor speeds can cause the VOR course deviation indicator (CDI) to fluctuate.>[...]

Aero-News: Quote Of The Day (02.27.15)

“With this new layer of liability protection, landowners are more likely to grant permission for the use of these airstrips." Source: Recreational Aviation Foundation (RAF) m>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC