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Cosmological model proposes dark matter production during pre-Big Bang inflation In UV freeze-in, the temperature of the thermal bath is always lower than the masses of the particles that connect dark matter to the Standard Model of particle physics. (Mass and temperature are both proportional to energy and can be related via ...
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NASA testing underwater robots to explore ocean worlds When NASA's Europa Clipper reaches Jupiter in 2030, it'll study the ocean that lies beneath the moon Europa's icy crust from orbit. NASA is already preparing for a possible follow-up mission, in which swimming robots could explore the watery depths of ...
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Feces and vomit fossils offer evidence explaining dinosaur supremacy The way the dinosaurs relinquished their long dominance is well known. An asteroid struck Earth 66 million years ago, triggering a horrific mass extinction. But the way the dinosaurs -- modest creatures initially -- came to supremacy is less well ...
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Volcano Watch: What sounds the (automated) alarms at HVO? The U.S. Geological Survey Hawaiian Volcano Observatory keeps its eyes on active volcanoes in many ways. While old-fashioned eyes and a notebook are used when field teams are near a volcano, modern volcano observatories also ...
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Space photo of the week: James Webb telescope spots a secret star factory in the Sombrero Galaxy This week, the James Webb Space Telescope zooms in on the iconic Sombrero Galaxy, revealing the first-ever mid-infrared observations of the hat-shaped wonder. When you purchase through links on our site, we may earn an affiliate commission.
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Astro Bob: December nights scintillate with stars and planets Venus dominates the southwestern sky at dusk with Saturn following in same direction at nightfall. Jupiter is so bright in the east it practically shouts "Look at me!" And Mars is just a month away from its closest approach to Earth in nearly two years.
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December Podcast: Jupiter Leads the Way It's going to be a fun month for planet-watching, and you can count on the month's Sky Tour episode to tell you where and when to catch the five "wandering stars" that you can see by eye. Even better, this month fetures what is arguably the best meteor ...
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December 2024: What's in the sky this month? Jupiter reaches its best Northern Hemisphere opposition in a decade Joining in late evening is brilliant Mars, now a month from opposition. Saturn is visible in the early evening, along with Venus soon after sunset. Uranus and Neptune remain visible with binoculars, and Mercury makes ...
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Footprints in Kenya reveal two ancient human species crossed paths Scientists previously knew from fossil remains that these two extinct branches of the human evolutionary tree – called Homo erectus and Paranthropus boisei – lived about the same time in the Turkana Basin. But dating fossils ...
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Delayed Big Bang for dark matter could be detected in gravitational waves It appears to account for about 27% of the mass–energy in the cosmos and is part of the Standard Model of cosmology. However, dark matter particles have never been observed directly. The Standard ...
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