科学与环境
An asteroid's shape influences where a nuclear blast must be aimed to deflect it
来源: Phys.org - latest science and technology news stories · 发布于
If a dangerous asteroid were headed toward Earth, one defense could be a nuclear detonation to blast one side with X-rays and nudge it off course. But new simulations suggest that for a lumpy, irregular asteroid, exactly where those X-rays hit could make a huge difference.
If a dangerous asteroid were headed toward Earth, one defense could be a nuclear detonation to blast one side with X-rays and nudge it off course. But new simulations suggest that for a lumpy, irregular asteroid, exactly where those X-rays hit could make a huge difference.
相关报道
Meteors don't just burn up. What really happens is far more violent
Scientists have uncovered seven surprising stages that space rocks go through as they hurtle toward Earth, revealing that melting and violent fragmentation, rather than simple evaporation, determine their fate. The discovery could help explain why meteorites scatter across the gr
All Top News -- ScienceDaily ·
Scientists discover a hidden oxygen reservoir deep inside Earth
Scientists have discovered that magma deep inside Earth can store surprising amounts of extra oxygen, potentially revealing a hidden contributor to our planet's oxygen-rich atmosphere. The findings suggest that ancient volcanic eruptions may have helped transform Earth's atmosphe
All Top News -- ScienceDaily ·
Red and green auroras may share electron-driven origins
With their mysterious glow and swirling veils of color, auroras enchant even experienced researchers. When a particularly intense solar storm reached Earth on the night of May 10, 2024, and relevant websites predicted auroras even for southern Lower Saxony, several researchers fr
Phys.org - latest science and technology news stories ·
The asteroid killed the dinosaurs. Why did crocodiles survive?
Scientists may have solved a 66-million-year-old mystery: how crocodiles survived the asteroid that wiped out the dinosaurs. A sweeping analysis of fossils and ancient climates suggests that their preference for warm environments placed them in tropical refuges that remained habi
All Top News -- ScienceDaily ·
Scientists confirm global warming is accelerating faster than ever recorded
Earth is warming faster than ever recorded, with scientists detecting a major acceleration in global temperatures since around 2015. A new study reveals that the warming rate has surged to approximately 0.35°C per decade, nearly double the average pace observed from 1970 to 2015.
All Top News -- ScienceDaily ·