Science – आवारा मुसाफिर

44 Percent of Earth’s land requires conservation to safeguard biodiversity

June 3, 2022220 Views

Rapid increases in the scope and effectiveness of global conservation efforts are critical to maintaining Earth’s ecological integrity New research published in the June 3, 2022 issue of journal Science reveals that 44 percent of Earth’s land area – some 64 million square kilometers (24.7 million square miles) requires conservation to safeguard biodiversity. The team, led by Dr James R. Allan from the University of Amsterdam, used advanced geospatial algorithms to map the optimal areas for conserving terrestrial species and ecosystems across the world. They further used spatially explicit land-use scenarios to quantify how much of this land is at risk from human activities by 2030. A drone view shows road traffic near Banco National Park in Abidjan, Ivory Coast May 16, 2022. REUT...

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AstroSat helps spot rare UV-bright stars in a massive cosmic dinosaur in the Milky Way

AWARA MUSAFIR BUREAU

January 22, 2021554 Views

Astronomers exploring the massive intriguing globular cluster in our Galaxy called NGC 2808 that is said to have at least five generations of stars have spotted rare hot UV-bright stars in it. These stars whose inner core is almost exposed, making them very hot, exist in the late stages of evolution of a Sun-like star. It is not clear how these stars end their lives as not many of them are detected in these fast-evolving phases, making their study crucial. A false colour image of the globular cluster NGC 2808 obtained using AstroSat/UVIT. The stars as seen using far-UV (FUV) filter are shown in blue colour, and the yellow colour is used to show the stars observed in near-UV (NUV). Motivated by the fact that old globular clusters referred to as dinosaurs of the universe present excel...