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Mixing cleaning products containing bleach or other oxygenates (such as Comet) with products that contain ammonia or acid is dangerous. The P&G Comet SDS specifically warns to: "Avoid contact with acids and ammonia." Despite being labeled as "scratch free", the label for Comet cleanser also advises the use of plenty of water on "delicate surfaces".
In 1999, New Age author V. M. Rabolú (1926–2000) wrote in Hercolubus or Red Planet that Barnard's Star is actually a planet known to the ancients as Hercolubus, which purportedly came dangerously close to Earth in the past, destroying Atlantis, and will come close to Earth again. [76] Lieder subsequently used Rabolú's ideas to bolster her ...
99942 Apophis (provisional designation 2004 MN 4) is a near-Earth asteroid and a potentially hazardous object with a diameter of 370 metres (1,210 feet) [3] that caused a brief period of concern in December 2004 when initial observations indicated a probability up to 2.7% that it would hit Earth on April 13, 2029.
Proxima Centauri b is the closest exoplanet to Earth, [20] at a distance of about 4.2 ly (1.3 parsecs). [5] It orbits Proxima Centauri every 11.186 Earth days at a distance of about 0.049 AU, [1] over 20 times closer to Proxima Centauri than Earth is to the Sun. [21] As of 2021, it is unclear whether it has an eccentricity [e] [24] but Proxima Centauri b is unlikely to have any obliquity. [25]
Examples of non-anthropogenic risks are an asteroid or comet impact event, a supervolcanic eruption, a natural pandemic, a lethal gamma-ray burst, a geomagnetic storm from a coronal mass ejection destroying electronic equipment, natural long-term climate change, hostile extraterrestrial life, or the Sun transforming into a red giant star and ...
The comet is currently moving through the Southern hemisphere and will cross the celestial equator (yellow vertical line) in 2032. The apparent loops in the comet's path are caused by the annual motion of the Earth around the Sun. With a current declination of −47° below the celestial equator, C/2014 UN 271 is best seen from the Southern ...
The Comet Shoemaker–Levy 9 impact provided the first direct observation of an extraterrestrial collision of Solar System objects, when the comet broke apart and collided with Jupiter in July 1994. An extrasolar impact was observed in 2013, when a massive terrestrial planet impact was detected around the star ID8 in the star cluster NGC 2547 ...
Dangerous criminal Riddick (Diesel) is being transported to prison in a spacecraft, and escapes when the spaceship is damaged by comet debris and crash lands on an empty desert planet. When predatory creatures begin attacking the survivors, Riddick joins forces with them to escape the planet.