ESA's Planck satellite builds on Nobel-prize-winning science

Oct 04, 2006
ESA's Planck satellite
Image shows telescope at the top containing two mirrors encased by a shield. The thicker base is the service module. Credits: ESA 2002. Illustration by Medialab

The 2006 Nobel Prize for physics has been awarded to Americans John C. Mather and George F. Smoot for their work on NASA's 1989 Cosmic Background Explorer (COBE) satellite. In 2008, ESA's Planck satellite will be launched and will build on this award-winning legacy by showing cosmologists new details of the Universe's origins.

COBE cemented the Big Bang theory of the Universe's origins but it could not answer every question. In some ways, it raised more than it answered, leaving cosmologists hungry to explore the details of how the Universe began. ESA's Planck satellite will help answer these questions.

As COBE did, Planck will look back to the dawn of time and observe the most ancient radiation in the Universe: the cosmic microwave background (CMB). Planck will do so with the most sensitive instruments ever brought to bear on this ancient radiation from space, the best place from which to make such observations.

"The Nobel committee's recognition of Mather and Smoot reinforces the fundamental importance of research into the microwave background radiation. With Planck, ESA looks forward to taking this research to a new level of detail," says Jan Tauber, Planck Project Scientist.

ESA's Planck satellite builds on Nobel-prize-winning science
The Cosmic Microwave Background comes from everywhere with (almost) the same intensity. This was confirmed by the COBE satellite, which measured (almost) the same temperature of 2.7 degree Kelvin everywhere on the sky. However, the very existence of other galaxies points to the fact that there should be very small changes in the measured 'temperature' of the CMB. These changes, or fluctuations, would have provided the seeds for the formation of the galaxies that we see today. Planck will be able to measure these tiny fluctuations. Indeed it will be able to distinguish temperature differences of 5 millionths of a degree! Credits: ESA

Whereas COBE convincingly confirmed that the Universe was born out of superheated primordial gas, Planck will look to understand the fundamental structure and components of the infant Universe, and for the details of how giant clusters of galaxies, and even individual galaxies, formed out of the initial fireball.

Building on the legacy of COBE, and NASA's follow-on mission WMAP, Planck will also investigate whether the Universe suffered a period of sudden exponential expansion, termed Inflation, shortly after the Big Bang. It will do this by surveying the whole sky, looking for subtle temperature variations in the CMB from place to place. The temperature variations betray regions of different density in the early Universe. High-density regions eventually became the galaxies and clusters of galaxies we see in the Universe today.

To achieve its goals, Planck has been designed to have ten times better instantaneous sensitivity and more than fifty times the angular resolution of COBE; these quantities taken together make Planck about one thousand times more powerful than COBE.

Source: ESA

Explore further: Continents may be a key feature of Super-Earths

add to favorites email to friend print save as pdf

Related Stories

Astronomers challenge Cosmological Model

Apr 03, 2014

(Phys.org) —Astronomers Professor Chris Collins and Dr Ian McCarthy from LJMU's Astrophysics Research Institute are challenging the view that the currently preferred cosmological model of the Universe is ...

Dark energy hides behind phantom fields

Mar 26, 2014

Quintessence and phantom fields, two hypotheses formulated using data from satellites, such as Planck and WMAP, are among the many theories that try to explain the nature of dark energy. Now researchers from ...

Building BICEP2: A conversation with Jamie Bock

Mar 18, 2014

Caltech Professor of Physics Jamie Bock and his collaborators announced on March 17, 2014 that they have successfully measured a B-mode polarization signal in the cosmic microwave background (CMB) using the ...

Recommended for you

Continents may be a key feature of Super-Earths

1 hour ago

Huge Earth-like planets that have both continents and oceans may be better at harboring extraterrestrial life than those that are water-only worlds. A new study gives hope for the possibility that many super-Earth ...

Exoplanets soon to gleam in the eye of NESSI

4 hours ago

(Phys.org) —The New Mexico Exoplanet Spectroscopic Survey Instrument (NESSI) will soon get its first "taste" of exoplanets, helping astronomers decipher their chemical composition. Exoplanets are planets ...

A sharp eye on Southern binary stars

Apr 17, 2014

Unlike our sun, with its retinue of orbiting planets, many stars in the sky orbit around a second star. These binary stars, with orbital periods ranging from days to centuries, have long been the primary ...

User comments : 0

More news stories

Continents may be a key feature of Super-Earths

Huge Earth-like planets that have both continents and oceans may be better at harboring extraterrestrial life than those that are water-only worlds. A new study gives hope for the possibility that many super-Earth ...

Researchers successfully clone adult human stem cells

(Phys.org) —An international team of researchers, led by Robert Lanza, of Advanced Cell Technology, has announced that they have performed the first successful cloning of adult human skin cells into stem ...

Under some LED bulbs whites aren't 'whiter than white'

For years, companies have been adding whiteners to laundry detergent, paints, plastics, paper and fabrics to make whites look "whiter than white," but now, with a switch away from incandescent and fluorescent lighting, different ...