Astrophysics and cosmology Archives – Page 22 of 59

Testing times for relativity

Albert Einstein’s theory of relativity is one of the most successfully tested ideas in physics. Based on the statement that the laws of physics are invariant under rotations and boosts – of...

Hyper Suprime-Cam offers new view on universe

A stunning image of the nearby Andromeda galaxy (M31) captured by the Subaru Telescope's Hyper Suprime-Cam (HSC) has demonstrated the instrument's capability of fulfilling the goal to use the ground-b...

Kilonova solves the short GRB puzzle

Follow-up observations of a recent short-duration gamma-ray burst (GRB) provide the strongest evidence yet that these elusive bursts result from the merger of two neutron stars. The evidence is in the...

AMS-02 provides a precise measure of cosmic rays

Results from the first two years of operation of the AMS experiment on the ISS were presented at ICRC 2013 in Rio de Janeiro.

Do fast radio bursts signal black-hole formation?

Astronomers using the 64-m Parkes radio telescope in Australia have detected radio transients with a duration of only 4 ms. These fast radio bursts (FRBs) are a recently discovered class of myste...

IceCube detects ultra-high-energy events and observes oscillations

Neutrino experiments – thanks to the nature of the particles themselves – are notoriously difficult and experiments that make use of the natural source of particles within the cosmic radiation fac...

DESY inaugurates prototype for the Cherenkov Telescope Array

The first prototype telescope for the planned Cherenkov Telescope Array (CTA) has been inaugurated in Berlin.

Galaxy clusters shed new light on dark matter

What is the actual distribution of dark matter? Does it follow the expectations for cold dark matter (CDM)? “Yes, it does,” according to a team of astronomers that has measured the average...

Why do some gamma-ray bursts last hours?

Three unusually long-lasting stellar explosions discovered by NASA’s Swift satellite represent a new class of gamma-ray bursts (GRBs). Astrophysicists conclude that they probably arose from the ...