(July 2, 2026)
Faced with observations of early black holes and galaxies that werenât expected to exist, scientists have come up with a wealth of new theories to explain them. Now they just need to figure out which ones are true.
Archiv: dark matter / Dunkle Materie
No need to Mind the Gap: Astrophysicists fill in 11 billion years of our universeâs expansion history
This map represents the combined effort of more than 20 years of mapping the Universe using the Sloan Foundation telescope. The cosmic history that has been revealed in this map shows that about six billion years ago, the expansion of the Universe began to accelerate, and has continued to get faster and faster ever since. This accelerated expansion seems to be due to a mysterious invisible component of the Universe called âdark energy,â consistent with Einsteinâs General Theory of Relativity but extremely difficult to reconcile with our current understanding of particle physics.
Millionen Galaxien und Quasare analysiert: Forschende schaffen bisher grösste 3D-Karte des Universums
Im Projekt forschte das Team bis zu elf Milliarden Jahre zurĂŒck in die Vergangenheit. Dazu benutzten sie sogenannte Quasare – der aktive Kern einer Galaxie, deren supermassenreiches Schwarzes Loch in ihrem Zentrum durch die darin eingeschlossene Materie extrem hell wird.
Die Karte zeigt, dass sich die Expansion des Universums an einem bestimmten Punkt beschleunigt hat und seither anhĂ€lt. Die Forschenden machen dafĂŒr dunkle Energie verantwortlich.
Spacewalkers press ahead with space station cosmic ray detector repair
The Alpha Magnetic Spectrometer was designed to detect high-energy cosmic rays in long-term research to learn what happened to the antimatter presumably cooked up in the big bang. It also is looking for clues about the nature of unseen dark matter and the equally mysterious dark energy that is speeding up the expansion of the universe.
Solving a century-long mystery: the origin of galactic cosmic rays
(04.04.2019)
The word âastronomyâ means the direct observations of extra-terrestrial objects. This definition is relevant to photons, neutrinos, and gravitational waves, i.e. massless, neutral and stable particles. But for cosmic ray electrons, protons, and nuclei, the term âastronomyâ is used with a certain reservation. Because of the deflections of electrically charged particles in the chaotic interstellar and intergalactic magnetic fields, the information about their original directions pointing to the sites of their production is lost. Instead, on the Earth, we detect an (almost) isotropic flux of cosmic rays contributed by a huge number of galactic and extragalactic sources.