How sunlight falls on Earth’s surface during the solstices and equinoxes, as seen from geosynchronous orbit.
Competition to name five impact craters on Mercury. Submit ideas December 15, 2014, to January 15, 2015. Finalists go to the IAU for selection of five winners.
As many as 100 Ursid meteors per hour have been seen – but only in short bursts. Expect 5 to 10 meteors per hour.
With a small ‘scope or large binoculars, you can catch Comet Finlay. It’ll be near Mars on December 23 and 24. Cool photo opportunity for those equipped to catch it!
Listen to how these waves cause surrounding ionized matter to ring like a bell. You’ve never heard anything from farther away …
In December, 2014, Venus out briefly after sunset; Mars up in early evening; Jupiter shines from mid-to-late-evening to dawn; Saturn in the southeast predawn; Mercury lost in the sun’s glare.
Curiosity rover has now measured a dramatic spike in methane, an organic chemical, in the Martian air, plus other organic molecules in a Martian rock.
Peak viewing was Saturday night, but, if you look in a dark sky late Sunday until dawn Monday, you might still catch a stray Geminid.
Meteors begin to glow almost as soon as they hit Earth’s atmosphere, but tend to vaporize (burn up completely) at varying altitudes.
There’s three times the concentration of deuterium-enriched water (heavy water) in the vapor from Rosetta’s comet as in the water on Earth.
Oo la la! Big organic compounds called PAHs may “strip” to create buckyballs in space.
The Curiosity rover on Mars is exploring the base of Mount Sharp, within the Gale Crater. Did the crater hold a series of lakes? Did lake sediments create the mountain?
You might see a lot or you might not see many, but if you stay in the house, you won’t see any.
The December Geminid meteor shower radiates from the constellation Gemini – in the east in mid-evening or overhead by about 2 a.m.
Calculations by NASA and Harvard say the closest the asteroid will get to Earth is about 2.7 million miles – over 10 times the moon’s distance – in April 2047.
Beautiful new time-lapse video from Jack Fusco, under Canada’s dark skies.
Every so often, the International Space Station (ISS) becomes visible in your night sky. Here’s how you can spot it.
It’s awake! On Saturday, the New Horizons spacecraft came out of hibernation, at the doorstep of Pluto.
We can’t ever say for sure what you saw in the night sky. But it might have been a flare from an iridium satellite.
1 Ceres is the largest and most massive object in the main asteroid belt, between the orbits of Mars and Jupiter. Dawn will reach it in March, 2015.
Dawn spacecraft’s chief engineer and mission director at JPL shares insights. Dawn due to reach Ceres in March, 2015. First spacecraft ever to orbit two planetary bodies!