Unveiling the formation of the first galaxies

Metallicity distribution of the first supernovae at 10 million years after the explosion. The supernova ejecta (orange region) has expanded to a radius of 1 kpc and enriched the surrounding gas to metallicities of 10-4 to 10-2 solar metallicity. The background yellow stripes are the cosmic structure of dark matter. …

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NOAA satellite animation captures vernal equinox

Credit: Unsplash/CC0 Public Domain Spring has officially arrived in the Northern Hemisphere, while the Southern Hemisphere is embracing autumn. The start of astronomical spring, known as the vernal equinox, occurred yesterday, March 19, 2024, at 11:06 p.m. EDT. During equinoxes, which happen twice a year, the Earth’s axis is not …

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