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

October 4, 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: A new experiment to understand dark matter

Related Stories

A new experiment to understand dark matter

June 15, 2018

Is dark matter a source of a yet unknown force in addition to gravity? The mysterious dark matter is little understood and trying to understand its properties is an important challenge in modern physics and astrophysics. ...

Lasers in space—Earth mission tests new technology

May 9, 2018

Imagine standing on the roof of a building in Los Angeles and trying to point a laser so accurately that you could hit a particular building in San Diego, more than 100 miles (160 kilometers) away. This accuracy is required ...

Image: Our galaxy's heart

May 14, 2018

At first glance, this image may resemble red ink filtering through water or a crackling stream of electricity, but it is actually a unique view of our cosmic home. It reveals the central plane of the Milky Way as seen by ...

Recommended for you

Hunting molecules to find new planets

June 19, 2018

It's impossible to obtain direct images of exoplanets as they are masked by the high luminous intensity of their stars. However, astronomers led by UNIGE propose detecting molecules present in the exoplanet's atmosphere in ...

Exploring planetary plasma environments from your laptop

June 15, 2018

A new database of plasma simulations, combined with observational data and powerful visualisation tools, is providing planetary scientists with an unprecedented way to explore some of the Solar System's most interesting plasma ...

NASA encounters the perfect storm for science

June 14, 2018

One of the thickest dust storms ever observed on Mars has been spreading for the past week and a half. The storm has caused NASA's Opportunity rover to suspend science operations, but also offers a window for four other spacecraft ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.