MIT researchers say gravitational waves from black hole-neutron star mergers may allow astronomers to more accurately measure how fast the Universe is expanding, resolving currently conflicting measurements of the Hubble constant.
Friday, 27 July sees the second total lunar eclipse of 2018, which also happens to be the longest of the 21st century. Observers in Antarctica, Australasia, Russia, Asia, Africa, Scandanavia, Europe, Central and Eastern South America will see the event. The Moon rises at mid-eclipse as seen from the British Isles, some 6 degrees north of Mars at opposition.
It’s holiday time again and the keen observer is faced with the usual dilemma: how does one carry a telescope small enough to be useful to far-flung dark and exotic skies? Fortunately for globe-trotters concerned about optical size and weight, Telescope Service in Germany has the TSAPO60 — a compact and very versatile photo-visual 60mm f/5.5 ED refractor.
Located in the rich Virgo cluster, a collection of more than 1,300 galaxies, NGC 4388 is classified as a spiral, but gravitational interactions with other members of the cluster are giving it a “confused” identity with features similar to those found in elliptical galaxies.