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NASA Astronomy Picture of the Day:

Comet Hale-Bopp, the Great Comet of 1997, became much brighter than any surrounding stars. It was seen even over bright city lights. Away from city lights, however, it put on quite a spectacular show. Here Comet Hale-Bopp was photographed above Val Parola Pass in the Dolomite mountains surrounding Cortina d'Ampezzo, Italy. Comet Hale-Bopp's blue ion tail, consisting of ions from the comet's nucleus, is pushed out by the solar wind. The white dust tail is composed of larger particles of dust from the nucleus driven by the pressure of sunlight, that orbit behind the comet. Comet Hale-Bopp (C/1995 O1) remained visible to the unaided eye for 18 months -- longer than any other comet in recorded history. The large comet is next expected to return around the year 4385. This month, Comet Leonard is brightening and may soon become visible to the unaided eye.

Photo by Col Druscie Obs.AAC

"Urban trees need a little extra care. In the German capital, anyone can give it to them. over the past few years those valuable species have begun to suffer due to Berlin’s increasingly extreme weather, which has seen summers become longer and drier and winters become wetter and stormier" Read more

Photo credit: frborsh/Pixabay

NASA Astronomy Picture of the Day:

very time two massive black holes collide, a loud chirping sound is broadcast out into the universe in gravitational waves. Humanity has only had the technology to hear these unusual chirps for the past seven years, but since then we have heard about 90 -- during the first three observing runs. Featured above are the spectrograms -- plots of gravitational-wave frequency versus time -- of these 90 as detected by the giant detectors of LIGO (in the USA), VIRGO (in Europe), and KAGRA (in Japan). The more energy received on Earth from a collision, the brighter it appears on the graphic. Among many science firsts, these gravitational-radiation chirps are giving humanity an unprecedented inventory of black holes and neutron stars, and a new way to measure the expansion rate of our universe. A fourth gravitational wave observing run with increased sensitivity is currently planned to begin in 2022 December.

"Food wastage is a global problem, and we all have a part to play in reducing it. As consumers, we throw away too much food. But much of our produce is wasted even before entering our supermarkets or homes.... There’s much more to food wastage than simply the spoiled vegetables in your trash". How much food do we waste, What is the worldwide impact and ? ...Read the eye opening statistics to help you understand the true cost of this waste, who is most responsible and how we can help to resolve it.... Read more

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