Planck photon rocket drives --- which in theory could hit velocities equal to 99.999 percent the speed of light --- might eventually offer propulsion engineers a way to drastically reduce interstellar ...

Haug has recently introduced a new maximum velocity for subatomic particles (anything with rest mass) that is just below the speed of light. This is combined with the relativistic rocket equation in ...

Although it outnumbers regular matter by a ratio of five to one, dark matter is frustratingly elusive. Many experiments have been and are being run to try to hunt down different types of candidate ...

The first cosmology results from the Planck satellite reveal an older universe populated with less dark energy and more matter than expected. This morning, scientists on the Planck space mission ...

The theories researchers use to describe the universe at small and large scales—from the Standard Model of particle physics to general relativity—have proven incredibly successful. Yet, such theories ...

Extremely massive fundamental particles could exist, but they would seriously mess with our understanding of quantum mechanics. Fundamental particles are objects that are so small, they have no deeper ...

On Monday, the European Space Agency unveiled a microwave map of the universe, the result of the first 10 months of observations by the Planck satellite. When Planck completes its mission next year, ...