Astronomers released the latest and most exquisite baby picture yet of the universe on Thursday, one that showed it to be 80 million to 100 million years older and a little fatter than previously thought, with more matter in it and perhaps ever so slightly lopsided.

Recorded by the European Space Agency’s Planck satellite, the image is a heat map of the cosmos as it appeared only 370,000 years after the Big Bang, showing space speckled with faint spots from which galaxies would grow over billions of years.

The map, the Planck team said in news conferences and in 29 papers posted online Thursday, is in stunning agreement with the general view of the universe that has emerged over the past 20 years, of a cosmos dominated by mysterious dark energy that seems to be pushing space apart and the almost-as-mysterious dark matter that is pulling galaxies together. It also shows a universe that seems to have endured an explosive burp known as inflation, which was the dynamite in the Big Bang.

In a statement issued by the European Space Agency, Jean-Jacques Dordain, its director general, said, “The extraordinary quality of Planck’s portrait of the infant universe allows us to peel back its layers to the very foundations, revealing that our blueprint of the cosmos is far from complete.”