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Posts by EarthSky

cropped-kepler-444
Science Wire | Jan 27, 2015

Astronomers discover oldest known Earth-sized planets yet

When our sun and planets were born, the Kepler-444 system was already older than our solar system is now.

rover-Opportunity-shadow-cp
Science Wire | Jan 27, 2015

Stunning panorama from Opportunity rover on Mars marks 11th year

A panoramic view of the desert world next door, from one of the highest elevations reached by the Mars rover Opportunity in its 11 years on the Red Planet.

(c) Joshua Nowicki Photoography
Science Wire | Jan 26, 2015

How to take photos of snowflakes

Try it yourself! With a little preparation and a good camera and with a macro lens, you can take your own photos of snowflakes.

Not sure which star is Sirius?  The three Belt stars of Orion - three stars in a short, straight row - always point to Sirius.
Tonight | Jan 26, 2015

Use brightest star Sirius to imagine sun’s path through Milky Way

At nightfall in January, stand with your back to Sirius, facing northwest. This is the direction our solar system moves through the Milky Way galaxy.

Image credit: NASA/CXC/M.Weiss
FAQs | Jan 25, 2015

What’s a safe distance between us and an exploding star?

Scientific literature cites 50 to 100 light-years as the closest safe distance between Earth and a supernova.

Artist's concept by Davide and Paolo Salucci
Science Wire | Jan 24, 2015

Is our Milky Way a wormhole?

In theory, our home galaxy Milky Way could be a wormhole – a galactic transport system – says a team of astrophysicists.

Photo Credit:  Erich Karkoschka, NASA
FAQs | Jan 23, 2015

What are the seasons like on Uranus?

Uranus, like Earth, has four seasons. But that’s where the similarity ends. For starters, each season on Uranus lasts 21 (Earth) years.

Image credit: ESA/VIRTIS/INAF-IASF/Obs. de Paris-LESIA/Univ. Oxford
Science Wire | Jan 21, 2015

Venus vortex!

This ghostly puff of smoke is actually a huge mass of swirling gas and cloud at planet Venus’ south pole, as seen by ESA’s Venus Express spacecraft.

Photo credit: Paul Sapiano
Science Wire | Jan 20, 2015

Video: How the smell of rain happens

When a raindrop hits a surface, tiny air bubbles burst from the drop in a fizz of aerosols. Watch the high-speed video.

Image credit: NASA
Science Wire | Jan 19, 2015

Video: Superstar Eta Carinae

Eta Carinae is a double system containing the most luminous and massive star within 10,000 light-years.