Scientists will now be able to measure how fast the universe is truly expanding with the kind of precision not possible before. This, after an international team of astronomers led by Stockholm University, Sweden, captured four distinct images of a gravitationally lensed Type Ia supernova, named iPTF16geu.
Several thousand years ago, a star some 160,000 light-years away from us exploded, scattering stellar shrapnel across the sky. The aftermath of this Type Ia supernova is shown here in this striking image from the NASA/ESA Hubble Space Telescope. The exploding star was a white dwarf located in the Large Magellanic Cloud, a close neighbouring galaxy.
This NASA/ESA Hubble Space Telescope image captures the remnants of a long-dead star. These rippling wisps of ionised gas, named DEM L316A, are the remains of an especially energetic Type Ia supernova located some 160,000 light-years away within one of the Milky Way’s closest galactic neighbours — the Large Magellanic Cloud (LMC).
Astronomers have used data from NASA’s Chandra X-ray Observatory and the VLA to determine the likely trigger for the most recent supernova in the Milky Way. They applied a new technique that could have implications for understanding other Type Ia supernovae, a class of stellar explosions that scientists use to determine the expansion rate of the universe.
Astronomers using the 10-metre Keck II and Pan-STARRS1 telescopes on Hawaii have discovered a Milky Way star travelling at a record 2.7 million miles per hour. Propelled by the thermonuclear detonation of a massive white dwarf companion, this hypervelocity star will escape the gravity of our Galaxy.