Astronomers using the Southern African Large Telescope (SALT), have measured the rotation of some of the largest spiral galaxies, spinning at up to 570 kilometres per second! Their rapid spin is a result of sitting within an extraordinarily massive cloud, or halo, of dark matter – invisible matter detectable only through its gravity. The largest […]
The Southern African Large Telescope (SALT), the largest optical telescopes in the Southern Hemisphere, has played an important role as part of the international Dark Energy Survey’s (DES, https://www.darkenergysurvey.org/) quest to pin down dark energy, the mysterious force accelerating the expansion of the universe. As part of the hunt, SALT conducted follow-up spectroscopy of supernovae – stars […]
A new binary star system has been discovered where a small white dwarf star is cannibalising its larger Sun-like companion. Such objects are actually quite common, but for this new object the white dwarf binged on its neighbour at a prodigious rate, heating part of it to nearly a million degrees. The object, named ASASSN-16oh, […]
Video animation produced using Gaia Sky showing the path of the hypervelocity star candidate by Shen et al (2018), with its movement exaggerated by a factor of 300 billion times. The path of the candidate is first shown moving forward in time and subsequently going into the past, back to the supernova remnant. The circle […]
SALT has discovered a binary star system in The Hourglass Nebula, one of the most famous nebulae captured by the Hubble Space Telescope. The Hourglass Nebula consists of two hourglass-shaped lobes of gas and what appears to be an eye staring right back at us. Shells of gas form the eye surrounding the hot central star […]
“Observing the fast and the furious: SAAO observes the first optical counterpart of a Gravitational Wave source” Above: An artist’s impression of a kilonova, the result of two colliding and merging neutron stars, which was the source of the first gravitational wave event (GW170817) for which an electromagmetic counterpart was detected at different wavelengths (picture credit: […]
SALT and SAAO telescopes partake in an unprecedented international collaboration to investigate the origin of the first detection of gravitational waves produced by two colliding neutron stars. The discovery marks the birth of a new era in astrophysics, the first cosmic event observed in both gravitational waves and light. SALT and other SAAO telescopes have provided […]
Discovery of one of the most luminous eruptions from a dying star: SALT contributes to a major international multi-wavelength effort led by South Africa. A multinational group of astronomers have discovered what it might be the brightest nova (a luminous stellar eruption) ever observed. This mighty eruption was first detected on the 14th of October […]
Recovery of nova spotted by ancient Koreans, illuminates many stages of star system’s life cycle On a cold March night in Seoul almost 600 years ago, Korean astronomers spotted a bright new star in the tail of the constellation Scorpius. It was seen for just 14 days before fading from visibility. From these ancient records, […]
SALT among the constellations of very large telescopes Many of us recently gathered together in Kazimierz Dolny, Poland, to attend the workshop ‘SALT among the constellations of very large telescopes’. This meeting comes around 2 years after the first conference dedicated to SALT science results that was held in Stellenbosch, South Africa. Kazimierz Dolny is […]
