Subscribe free to our newsletters via your
. 24/7 Space News .




SPACE SCOPES
Herschel And Planck Share Ride To Space
by Staff Writers
Pasadena CA (SPX) May 07, 2009


Both spacecraft have been mated to their rocket and are being readied for launch. Shortly after liftoff, they will separate from the rocket and follow different trajectories.

Two missions to study the cosmos, Herschel and Planck, are scheduled to blast into space May 14 aboard the same Ariane 5 rocket from the Guiana Space Center in French Guiana. The European Space Agency, or ESA, leads both missions, with significant participation from NASA.

"The missions are quite different, but they'll hitch a ride to space together," said Ulf Israelsson, NASA project manager for both Herschel and Planck. "Launch processing is moving along smoothly. Both missions' instruments have completed their final checkouts, and the spacecrafts' thruster tanks have been fueled."

Israelsson is with NASA's Jet Propulsion Laboratory, Pasadena, Calif., which contributed key technology to both missions. NASA team members will play an important role in data analysis and science operations.

The Herschel observatory has the unique ability to peek into the dustiest and earliest stages of planet, star and galaxy growth.

The spacecraft's astronomy mirror - about 3.5 meters (11.5 feet) in diameter - is the largest ever launched into space. It will collect longer-wavelength light in the infrared and submillimeter range - light never before investigated by an astronomy mission.

"We haven't had ready access to the wavelengths between infrared and microwaves before, in part because our Earth's atmosphere blocks them from reaching the ground. We will now have access to these wavelengths thanks to Herschel's large, cold telescope in space, and its detectors' improved sensitivity," said Paul Goldsmith, the NASA project scientist for Herschel at JPL.

"Because our views were so limited before, we can expect a vast range of serendipitous discoveries, from new molecules in interstellar space to new types of objects."

The coolest objects in the universe, such as dusty, developing stars and galaxies, appear as dark blobs when viewed with visible-light telescopes, so astronomers don't know what's happening inside them. But at longer wavelengths in the far-infrared and submillimeter range, cool objects perk up and shine brightly.

Herschel will detect light from objects as cold as minus 263 degrees Celsius, or 10 Kelvin, which is 10 degrees above the coldest temperature theoretically attainable.

To do this, the observatory's instruments must be cold, too. Onboard liquid helium, which is expected to last more than three-and-a-half years, will chill the coldest of Herschel's detectors to a frosty 0.3 Kelvin.

Planck has a different goal. It will answer fundamental questions about how the universe came to be, and how it will change in the future. It will look back in time to just 400,000 years after our universe exploded into existence nearly 14 billion years ago in an event known as the Big Bang.

The mission will spend at least 15 months making the most precise measurements yet of light at microwave wavelengths across our entire sky - including what's known as the cosmic microwave background. This microwave light has even longer wavelengths than what Herschel will see, but it's not from cool objects.

In this case, the light is from the hot, primordial soup of particles that eventually evolved to become our modern-day universe. The light has traveled nearly 14 billion years to reach us, and, in that time, has cooled and stretched to longer wavelengths because space is expanding.

By measuring minute variations in the cosmic microwave background as small as a few parts per million, Planck will give us a new and improved assessment of our universe - its age, composition, size, mass and geometry.

We'll also learn more about the theorized early inflation of our universe, when it is thought to have expanded 100 trillion, trillion times. That's just one trillion, trillion, trillionth of a second after the Big Bang.

"The cosmic microwave background shows us the universe directly at age 400,000 years, not the movie, not the historical novel, but the original photons," said Charles Lawrence, NASA project scientist for Planck at JPL.

"Planck will give us the clearest view ever of this baby universe, showing us the results of physical processes in the first brief moments after the Big Bang, and the starting point for the formation of stars, galaxies, and clusters of galaxies. The clear view is a result of Planck's unprecedented combination of sensitivity, angular resolution, or sharpness, and frequency coverage."

Like Herschel, Planck will be cold; in fact, one of its instruments will be cooled to just 0.1 Kelvin. But it won't carry liquid coolant. Instead, it will chill itself with innovative "cryocooler" technology, developed in part by JPL.

Both spacecraft have been mated to their rocket and are being readied for launch. Shortly after liftoff, they will separate from the rocket and follow different trajectories.

By two months later, the missions will have made their way to their final, distinct orbits around the second Lagrangian point of the Earth-sun system, a point in space 1.5 million kilometers (930,000 miles) from Earth, or four times farther from Earth than the moon.

This point is on the other side of Earth from the sun, providing the spacecraft with dark, expansive views of the sky. It is also far enough away that the heat from Earth and the moon won't warm up the telescopes.

.


Related Links
Herschel
Planck
Space Telescope News and Technology at Skynightly.com






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SPACE SCOPES
NASA Launches James Webb Space Telescope Educational On-Line Game
Washington DC (SPX) May 05, 2009
NASA has developed a flash on-line game about telescopes, featuring NASA's next-generation spacecraft, the James Webb Space Telescope! The game, called "Scope it Out!" includes an introduction to telescopes and four matching games where you can compare simple telescopes to both Webb and the Hubble Space Telescope. "This is a great way to teach children and adults on how simple and complex ... read more


SPACE SCOPES
Lawmakers To Honor Space Pioneers

Indian Lunar Orbiter Sends Back Images To Establish Water Presence On Moon

US scientists plan greenhouses on the Moon

NASA Twin Spacecraft May Reveal Secret Of Lunar Origin

SPACE SCOPES
NASA Selects Future Projects To Study Mars And Mercury

Focused On Phobos

Spirit problems still baffle scientists

Spirit Resumes Driving While Analysis Of Problem Behaviors Continues

SPACE SCOPES
NASA Wins Two Webby Awards

NASA Goddard Space Flight Center Celebrates 50 Years Of Scientific Excellence

NASA to study antifungal drugs in space

NASA to air astronaut induction ceremony

SPACE SCOPES
China Launches Yaogan VI Remote-Sensing Satellite

China Able To Send Man To Moon Around 2020

China To Launch 15 To 16 Satellites In 2009

Macao Donates 14 Million Yuan To Mainland Space Program

SPACE SCOPES
Russian Space Freighter Progress M-66 Undocks From ISS

European-Built Node 3 Starts Its Journey To The ISS

Happy US-Russian crew deny 'divorce in space'

NASA to unveil space station name on Colbert show

SPACE SCOPES
Planck Mated With The Ariane 5 ECA Launcher

Base Considers Disassembling Historical Launch Complex

Continental Provides New Tires For Payload Transporter

NATO satellite launched on Russian-Ukrainian rocket

SPACE SCOPES
Some planets may fall into their stars

Super-Earth And An Ocean World

Mass Loss Leaves Close-In Exoplanets Exposed To The Core

Lightest Exoplanet Yet Discovered

SPACE SCOPES
Boeing Completes PDR For Tracking And Data Relay Satellite Series K-L

Making The Space Environment Safer For Civil And Commercial Users

Virtual mobility for disabled wins Second Life prize

New Book Highlights Success Stories In Satellite Systems




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement