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The cosmic dark ages lasted no more than 180 million years.
Astronomers have picked up a long-sought signal from some of the universe's first stars, determining that these pioneers were burning bright by just 180 million years after the Big Bang.
Scientists had long suspected that dawn broke over the cosmos that long ago; theorists' models predict as much. But researchers had never had the evidence to back it up until now. Before this new study, the oldest stars ever seen dated to about 400 million years after the Big Bang.
"This pushes our knowledge of when and how stars formed to earlier times in the universe," said study lead author Judd Bowman, an astronomer at Arizona State University's School of Earth and Space Exploration.
These very ancient stars were trailblazers. Though they coalesced from primordial hydrogen and helium, they set in motion a continuing process of star birth and death that ended up, over the eons, seeding the universe with heavy elements — the stuff that rocky planets like Earth are made of.
A dangerous flooding situation unfolded in south-central Texas Tuesday morning near the town of Llano, as heavy rain exacerbated ongoing river flooding, prompting evacuations and a bridge collapse.
Según los pronósticos de AccuWeather, los efectos del fenómeno de El Niño tendrán una influencia significativa en los patrones que marcarán las condiciones del tiempo por los próximos meses.
As Arctic permafrost thaws, greenhouse gases are released into the atmosphere, which may accelerate abrupt thawing and influence the formation of Arctic lakes.
The Orionid meteor shower is created by particles from Halley’s Comet, which Earth passes through twice a year.
One of the most famous meteor showers of the year is set to reach its peak this weekend as the Orionids will be visible in the night sky.
Blasts of cold air will not only bring the lowest temperatures of the season so far to the northeastern United States, but also the first snowflakes of the season to some areas and the risk of damaging wind gusts into this weekend.
In the event of an impending natural disaster, those facing a direct threat will have to consider the options of evacuating to a safer location versus sheltering in place.
Hurricane Michael slammed through the Florida panhandle and into Georgia last week. President Donald Trump surveyed the hurricane-torn areas of Florida and Georgia on Monday, Oct.15.