Today's featured article
Pavo is a constellation in the southern sky with the Latin name for peacock. It is one of twelve constellations conceived by Petrus Plancius from the observations of Pieter Dirkszoon Keyser and Frederick de Houtman. First appearing on a 35 cm (14 in) diameter celestial globe published in 1598 in Amsterdam by Plancius and Jodocus Hondius, it was depicted in Johann Bayer's star atlas Uranometria of 1603. The constellation's brightest member, Alpha Pavonis, is also known as Peacock and appears as a 1.91-magnitude blue-white star, but is actually a spectroscopic binary. Delta Pavonis is a Sun-like star some 19.9 light years distant. Six of the star systems in Pavo have been found to host planets, including HD 181433 with a super-earth, and HD 172555 with evidence of a major interplanetary collision in the past few thousand years. The constellation contains NGC 6752, the third-brightest globular cluster in the sky, and the spiral galaxy NGC 6744, which closely resembles our Milky Way but is twice as large. (Full article...)
In the news
- In cycling, Chris Froome (pictured) wins his third Tour de France title.
- ISIL suicide bombers attack a peaceful protest in Kabul, Afghanistan, killing at least 80 people and injuring 260.
- In athletics, American sprinter Kendra Harrison breaks the 28-year-old 100 metres hurdles world record at the London Grand Prix.
- A gunman opens fire near a shopping mall in Munich, Germany, killing 9 people and injuring 27.
- The Turkish government purges tens of thousands of alleged Gülenists following an unsuccessful coup that killed at least 290 people.