231,703 subscribers and counting ...
They are an ethereal display of colored lights shimmering across the night sky – the aurora borealis or northern lights. What causes them?
New Year’s Day is a civil event. Its date isn’t precisely fixed by any natural seasonal marker.
December solstice 2015 was December 22. Earth will closest to the sun in 2016 on January 2. Coincidence?
A wondrous star has grown to be a major symbol of Christmas around the world. But what was it, really?
At the North and South Poles, sunrise comes at the spring equinox, noon at the summer solstice, sunset on the autumn equinox and midnight at the winter solstice.
December has two birthstones, turquoise and zircon.
Jupiter’s gravity slings long-period comets out of harm’s way, while nudging some asteroids closer to Earth. And, in 1770, Jupiter took aim on Earth – but missed.
Supervolcanoes – massive eruptions with potential global consequences – don’t appear to follow the conventional volcano mechanics, say researchers.
A big El Niño is developing in 2015, say scientists. This NASA video explains El Niño and its impact on the marine food web.
November’s birthstone, the topaz, was thought to have the power to cool boiling water, as well as excessive anger.
Focus on stars Betelgeuse and Rigel