Enjoying EarthSky? Subscribe.

147,663 subscribers and counting ...

Space

ceres-2-19-2015-dawn-cp
Science Wire | Apr 07, 2015

Update on Dawn spacecraft at Ceres

When will we see new images of the mysterious bright spots on Ceres’ surface?

The sun, via NASA
Science Wire | Apr 07, 2015

Scientists report seasonal changes on sun

Migrating bands of magnetic fields on the sun produce 2-year variations in solar activity as strong as those in the more familiar 11-year solar cycle.

According to modern physics, any information about an astronaut entering a black hole - for example, height, weight, hair color - may be lost.  Likewise, information about he object that formed the hole, or any matter and energy entering the hole, may be lost.  This notion violates quantum mechanics, which is why it's known as the 'black hole information paradox."
Science Wire | Apr 06, 2015

Black holes don’t erase information

Since 1975, when Hawking showed that black holes evaporate from our universe, physicists have tried to explain what happens to a black hole’s information.

Photo credit: Fred Espenak
FAQs | Apr 03, 2015

Why a totally eclipsed moon looks red

If Earth didn’t have an atmosphere, then, when the moon was entirely eclipsed within Earth’s shadow, the moon would would appear dark …

Hubble view of green filament in Teacup galaxy
Science Wire | Apr 02, 2015

Hubble spies enigmatic quasar ghosts

Astronomers use the Hubble Space Telescope to examine 8 ethereal wisps orbiting distant galaxies, illuminated by blasts of radiation from quasars.

W75N(B)-VLA2-1996-2014-cp
Science Wire | Apr 02, 2015

Astronomers witness a massive star’s birth

Two images of a very massive star, made 18 years apart, have given astronomers a real-glimpse of how massive stars develop early in their evolution.

Photo Credit: NASA
FAQs | Apr 02, 2015

Are solar eclipses more common than lunar eclipses?

It’s sometimes said that, on a worldwide scale, solar eclipses outnumber lunar eclipses by about a three to two margin. True?

Eclipses for Beginners
FAQs | Apr 01, 2015

Why aren’t there eclipses at every full and new moon?

There’s not an eclipse at every new and full moon, but there are from four to seven eclipses every year. Some are lunar, some are solar, some are total, and some are partial.

Skywatcher, by Predrag Agatonovic.
Tonight | Mar 31, 2015

April 2015 guide to the five visible planets

Three planets easy to see throughout April 2015. Venus and Jupiter at nightfall. Saturn late evening on. Mercury joins after sunset in late April.

NASA's Low-Density Supersonic Decelerator
Science Wire | Mar 31, 2015

Public invited to NASA flying saucer broadcast today

NASA’s rocket-powered, saucer-shaped test vehicle soon will fly into near-space. Join an hour-long live, interactive video broadcast on March 31.