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Photo credit: Markus Grossalber/Flickr
Science Wire | Aug 22, 2014

Your toothpaste’s fluorine was formed in a star

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.

Science Wire | Aug 22, 2014

New Voyager map reveals Neptune’s strange moon Triton

New map from a 1989 spacecraft flyby gives us a glimpse of an unseen world.

Neptune's rings via Voyager 2.
Blogs | This Date in Science | Aug 22, 2014

This date in science: Definitive discovery of Neptune’s rings

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.

Science Wire | Aug 20, 2014

Wow! Spectacular landscape of star formation

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.

Hoax image via social media.
Blogs | Tonight | Aug 20, 2014

Double moon on August 27?

Will Mars and the moon will appear the same size on August 27, 2014? Nope.

View larger. | A routine wheel survey on sol 631 found the right rear wheel perched atop a spike-shaped rock firmly embedded in the ground.
Science Wire | Aug 19, 2014

Curiosity rover is having wheel problems

Mission planners didn’t anticipate that Curiosity would be driving over an area on Mars that has sharp, pyramid-shaped rocks embedded in hard ground.

M82 X-1
Science Wire | Aug 19, 2014

Strange case of M82 X-1: A rare midsize black hole

A black hole candidate known as M82 X-1 appears to have a mass of about 400 suns, making it one of only half a dozen suspected midsize black holes.

Curiosity self-portrait Feb. 3, 2013 via NASA
Science Wire | Aug 18, 2014

Video: Our Curiosity

A video love letter to the Curiosity rover on Mars, narrated by Neil DeGrasse Tyson and Felicia Day.

Trifid Nebula, aka M20, by Martin MacPhee
Blogs | Photos | Tonight | Aug 18, 2014

Exploring the Trifid Nebula

It’s a stellar nursery, a cluster of young stars, a bright red emission nebula, a lovely blue reflection nebula, and an interesting dark nebula divided into three …

Potential landing sites on Comet 67P/Churyumov–Gerasimenko.  Credits: ESA / CNES (Centre National d'études Spatiales) / German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt, DLR) / Rosetta.
Science Wire | Aug 17, 2014

Potential landing sites on Rosetta’s comet

Rosetta comet mission scientists and engineers will meet later this coming weekend to narrow the selection for the mission’s Philae lander to five potential landing sites.

Screen Shot 2014-08-13 at 10.10.44 AM
Science Wire | Aug 16, 2014

New video of Pluto and giant moon Charon

NASA’s Pluto-bound New Horizons spacecraft created this new video of stills taken of the Pluto-Charon system over five days last month.

Science Wire | Aug 14, 2014

First dust grains from beyond our solar system

A collector dropped to Earth by the Stardust spacecraft may have contained the first known contemporary dust grains from outside our solar system.

Skywatcher, by Predrag Agatonovic.
Tonight | Aug 13, 2014

August 2014 guide to the five visible planets

The waning crescent moon pairs up with Jupiter and Venus at dawn on Saturday, August 23. By the month’s end on Sunday, August 31, the waxing crescent moon joins up with Mars and Saturn in the evening sky.

Ligeia Mare, a northern sea of Titan. Image via NASA.
Science Wire | Aug 13, 2014

Watch clouds move over a methane sea on Titan

NASA has released an animation of methane clouds moving above a hydrocarbon sea on Saturn’s large moon, Titan.

Artist's concept by Suman Satyal via UT Arlington
Science Wire | Aug 12, 2014

A new way to search for exomoons

We now know more than 1,800 exoplanets – worlds orbiting distant suns – but zero exomoons. UT Arlington physicists propose a new way to search for them.

Image credit: NASA/JPL-Caltech/Space Science Institute
Science Wire | Aug 12, 2014

The eye of Saturn

Like a giant eye, the great vortex at the north pole of planet Saturn stares back at the Cassini spacecraft as Cassini stares at it.

Screen Shot 2014-08-11 at 1.49.48 PM
Science Wire | Aug 11, 2014

Video: Colliding atmospheres of Mars and Comet Siding Spring

Martian auroras? Maybe a meteor shower? What Mars satellites might see when Comet Siding Spring sweeps super close to Mars this October.

Science Wire | Aug 11, 2014

Video: Rosetta’s race to map its comet

Last week, Rosetta became the first spacecraft ever to rendezvous with a comet. Now the spacecraft is in a race against time. Rosetta’s next challenges, here.

Meteor seen during 2013 Eta Aquarid shower by Justin Ng
Tonight | Aug 11, 2014

EarthSky’s meteor shower guide for 2014

The moon has gotten really large and bright in the sky. Full moon – closest supermoon this year – comes on August 10. Luckily, the Perseids produce more fireballs than any other meteor shower.

Photo credit: Oliver Floyd
FAQs | Aug 11, 2014

How often do 7 eclipses occur in 365 days?

It’s rare to have 7 eclipses in a calendar year. It’s less rare to have 7 eclipses in 365 days. There are 7 eclipses in 365 days 29 times in the 21st century!

Full moon photo via Lee Capps.
Science Wire | Aug 10, 2014

Video: Why does the moon look so big on the horizon?

August 10 supermoon is the closest full moon for 2014. It might look super big seen near a horizon. But all horizon moons look big, due to the moon illusion.