Explorando os Enigmas do Superuniverso
Elements in distant stars could reveal whether they originated in the same stellar nursery as our sun. Is the sun due for a cosmic family reunion? A new survey of 1 million stars in the Milky Way galaxy could help astronomers link our sun to its long-lost siblings. The survey will identify stellar “DNA”: the […]
A moderate geomagnetic storm kicked up in Earth’s skies Friday morning (April 20), bringing green and rare electric-blue auroras that stretched as far south as Indiana. The space-weather news site Spaceweather.com reported that an “interplanetary shock wave” hit Earth’s magnetic field at about 3:50 a.m. EDT (2350 on April 19 GMT), quadrupling the intensity […]