Like cosmic ballet dancers, the stars of the Pleiades cluster are spinning, but all at different speeds. By watching these stellar dancers, NASA’s Kepler space telescope has helped amass the most complete catalogue of rotation periods for stars in a cluster. This information can provide insight into where and how planets form around these stars, and how such stars evolve.
Physicists and astronomers from the University of Texas at Arlington have used advanced software to accurately date lyric poet Sappho’s “Midnight Poem,” which describes the Pleiades star cluster in the constellation of Taurus having set at around midnight, when supposedly observed by her from the Greek island of Lesbos more than 2,500 years ago.
Have you ever seen Mercury with the naked eye? If not, now is the time to check the elusive innermost planet off your list. Mercury reaches greatest easterly elongation from the Sun on Monday, 18 April, the highlight of a very favourable dusk apparition in the west-northwest for observers in Western Europe and the British Isles.