Next time you’re brushing you teeth, think on this: New research suggests that the fluorine in your toothpaste originates from the sun’s dead ancestors.
Posts by EarthSky
A few days before the NASA spacecraft Voyager 2 skimmed by Neptune in 1989, it acquired images of a faint, continuous ring system encircling the planet.
New image of star-forming regions in southern Milky Way. Star cluster NGC 3603 is 20,000 light-years away. Glowing gas clouds NGC 3576 is about half as far.
You can find the Andromeda galaxy – also known as M31 – in several ways. One is by star-hopping from the Great Square of Pegasus.
This strange fossil – a worm-like creature with legs, spikes and a head that’s difficult to distinguish from its tail – has been linked with a group of modern velvet worms.
It’s said that once you’ve seen a green flash, you’ll never go wrong in matters of the heart. Here’s all you need to know … plus great pics.
In light of the sheer physical enormity of the Great Pacific Garbage Patch and the complexity of its causes, what can we possibility do about it?
Martian auroras? Maybe a meteor shower? What Mars satellites might see when Comet Siding Spring sweeps super close to Mars this October.
Which is brighter – Perseid fireballs or a supermoon? You’ll find out as the year’s biggest, brightest full moon arrives as Perseid meteor shower starts to peak.
Look at the difference in these two reservoirs north of Fresno, California, in contrasting satellite images from 2011 and 2014.