Tag Archives: cosmic

Unexpectedly, the universe gets hotter as it expands

[ad_1] For nearly a century, astronomers have understood that the Universe is in a state of expansion. Since the 1990s, they have realized that since 4 billion years ago, the rate of expansion has been accelerating. As this progresses, and the galaxy clusters and filaments of the Universe move further …

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Ancient tree rings can contain stories of epic space explosions

[ad_1] A massive dying star is not a peaceful event. It expels its outer material in a colossal explosion, irradiating space with high-energy gamma radiation for several years. However, empty space isn’t the only thing exposed to this radiation. New research suggests that Earth’s ancient trees may contain evidence of …

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