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Tag: mysterious

Mysterious rise in emissions of ozone-damaging chemical

Mysterious rise in emissions of ozone-damaging chemical

Science
Scientists have detected an unexpected rise in atmospheric levels of CFC-11, a chlorofluorocarbon (CFC) highly damaging to the ozone layer.Banned by the Montreal Protocol in 1987, CFC-11 was seen to be declining as expected but that fall has slowed down by 50% since 2012.Researchers say their evidence shows it's likely that new, illegal emissions of CFC-11 are coming from East Asia.These could hamper the recovery of the ozone hole and worsen climate change.CFC-11 is also known as trichlorofluoromethane, and is one of a number of CFCs that were initially developed as refrigerants during the 1930s. They were also used as propellants in aerosol sprays and in solvents. However, it took many decades for scientists to discover that whe...
Mysterious streak lights up Californian sky

Mysterious streak lights up Californian sky

Technology
The rocket was launched at about 5.30pm (9pm GMT) in Los Angeles on Friday.It successfully propelled 10 satellites into orbit an hour later.The rocket first appeared as a red light which looked more like an unusual coloured star.As it gathered height Californians were in awe as they saw a streak of light streaming across the clear sky at sunset.Image:The rocket propelled 10 satellites into orbit. Pic: Danny SullivanImage:Californians were in awe as the rocket streaked across the sky. Pic: Danny SullivanImage:The SpaceX rocket started off as a small white light. Pic: Danny SullivanSeveral celebrities joined fellow social media users in questioning what the mysterious light was.Singers will.i.am and Billy Ray Cyrus asked what the streak was.Skateboarding legend Tony Hawk, who was 120 miles ...
Scientists still confounded by Milky Way's most mysterious star

Scientists still confounded by Milky Way's most mysterious star

Science
Oct. 4 (UPI) -- Tabby's Star continues to confound astronomers. New analysis shows the Milky Way's 'most mysterious star' has experienced brief periods of brightening amid its prolonged dimming.The star, officially titled KIC 8462852, and sometimes called Boyajian's Star, first caught astronomers attention in 2015. While monitoring the F-type main-sequence star, NASA's Kepler Space Telescope captured a series of rapid dimming events.When researchers analyzed archival observation of the star, they found Tabby's Star has been gradually dimming for some time. Astronomers came up with a variety of explanations for the dimming episodes, including periodic transits by exoplanets or dust clouds.However, a more recent survey of 11 years of KIC 8462852 observations revealed two brief brightening st...