What are the mysterious dark matter and dark energy that seem to account for so much of our universe? Why is the universe expanding? For the past 30 years, most cosmologists have looked to the ...

There's always a touch of melancholy when a chapter that has absorbed years of work comes to an end. In the case of the ...

Mr. Sundman earned a Masters of Science degree through the Department of Engineering Physics at Helsinki University of Technology. There, Stig became interested in elementary particle physics, with ...

New measurements of radio galaxies reveal that the solar system is racing through the universe at over three times the speed ...

The clearest pictures yet of the newborn cosmos strengthen the prevailing model of the universe but deepen a mystery about its expansion rate. Measurements of this rate, known as the Hubble constant, ...

A new study probing the structure and evolution of galaxy clusters shows good agreement with the predictions of standard cosmological models. Cosmologists have found new evidence for the standard ...

Precise measurements from multiple radio telescopes strongly suggest that our solar system is moving far too fast for our models. There is no explanation. The solar system is moving through the ...

In heavenly fields like astrophysics and cosmology, scientists here on the ground necessarily have a limited set of tools at their disposal. Various kinds of telescopes allow for the study of objects ...