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Today's featured article Habitable zones of TRAPPIST-1 and the Solar System TRAPPIST-1 is a cool red dwarf star with seven known exoplanets. It lies in the constellation Aquarius about 40.66 light-years away from Earth. It has a mass of about 9% of the Sun and is estimated to be 7.6 billion years old, making it older than the Solar System. The discovery of the star was first published in 2000. Observations in 2016 from the Transiting Planets and Planetesimals Small Telescope (TRAPPIST) led to the discovery of two orbiting terrestrial planets, and five more were found in 2017. It takes the seven planets between about 1.5 and 19 days to orbit around the star. They are likely tidally locked to TRAPPIST-1, leading to permanent day on one side and night on the other. Their masses are comparable to that of Earth. Up to four of the planets orbit at distances where temperatures are suitable for the existence of liquid water (diagram pictured), and are thus potentially hospitable to life. This has drawn interest from both researchers and popular culture. (Full article...) Recently featured: iMac G4 Merchant's House Museum Marie Sophie Hingst  Today's featured media Lamium purpureum, commonly known as the red dead-nettle, among other names, is an annual herbaceous flowering plant. Native to Eurasia, it can also be found in North America, and frequently occurs in meadows, forest edges, roadsides and gardens. It grows with square stems to 5 to 20 centimetres (2 to 8 inches) in height, and occasionally up to 40 centimetres (16 inches). The leaves have fine hairs, are green at the bottom and shade to purplish at the top, while the zygomorphic flowers are bright reddish purple. The pollen is crimson red in colour and thus very noticeable on the heads of the bees that visit its flowers. The plant contains various oils and is characterized by its high contents of germacrene D. Young plants have edible tops and leaves, which are used in salads or stir fries as a spring vegetable. The plant has also been used for many years in folk medicine and herbal remedies. This L. purpureum inflorescence was photographed in Tutermaa, Estonia. The picture was focus-stacked from 101 separate images. Photograph credit: Ivar Leidus Recently featured: Field ration – Dendrelaphis punctulatus – A Peculiar Family Archive – More featured media...  Did you know Zhou Enshou ... that Zhou Enshou (pictured) was arrested during the Cultural Revolution on the orders of his own brother? ... that viewers complained that the 2023 Coronation Street Christmas Day episode was only 30 minutes long? ... that Wilf Pine, manager of Black Sabbath, had his arm dislocated by a vibrating bed because Ozzy Osbourne kept feeding it quarters? ... that the wreck of SS Virago, which sank off Alderney in 1882 with the loss of all crew members, was not discovered for 127 years? ... that João Barrento had been a distinguished equestrian in Portugal since he was a teenager, but only made his Olympic debut in his forties? ... that Kylie Minogue released "Timebomb" after attracting 25,000 tweets in less than 45 minutes? ... that a community mural inspired by John Jonik's pet duck was destroyed by a cleanup crew who mistook it for graffiti? ... that the British Army deliberately kept conditions at Blargies prison camp poor to prevent soldiers on the Western Front from viewing it as a "soft" alternative to combat? ... that Terry Brown is reported to have founded an escort service using helicopters for remote rural areas?

In the news Tadej Pogačar An 8.8-magnitude earthquake strikes off the coast of the Kamchatka Peninsula, Russia, triggering tsunami warnings across the Pacific Ocean. In cycling, Tadej Pogačar (pictured) wins the Tour de France. In association football, the UEFA Women's Euro concludes with England defeating Spain in the final. American professional wrestler Hulk Hogan dies at the age of 71. Ongoing: Gaza war Russian invasion of Ukraine timeline Sudanese civil war timeline Recent deaths: Georges Lemoine Michael Hill G. Holmes Braddock Cleo Laine Tom Lehrer Willie Irvine  This day in history August 2: Roma Holocaust Memorial Day Drawing of the interior of the Tower Subway 1870 – One of the world's earliest underground tube railways opened in the Tower Subway (interior depicted), a tunnel beneath the River Thames in London. 1923 – Calvin Coolidge became the 30th president of the United States after Warren G. Harding suffered a fatal heart attack. 1932 – At the California Institute of Technology, American physicist Carl David Anderson proved the existence of antimatter with the discovery of the positron, for which he would receive the 1936 Nobel Prize in Physics. 1971 – The English rock band the Who released Who's Next, their only album to top the UK charts. 2007 – Raúl Iturriaga, a former deputy director of the Chilean secret police, was captured in Viña del Mar after having been on the run following a kidnapping conviction. Thomas Grey (d. 1415) Bertha Lutz (b. 1894) Jean-Pierre Melville (d. 1973) JD Vance (b. 1984) More anniversaries: August 1 August 2 August 3

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