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Blogs | Mar 13, 2015

March 20 eclipse and the Saros

There are currently 40 different Saros series in progress, each with its own assigned number. The total solar eclipse of March 20, 2015 belongs to Saros 120.

Planet Uranus via Voyager 2 in 1986
This Date in Science | Mar 13, 2015

This date in science: Uranus discovered, completely by accident

William Herschel noticed while surveying stars that one object moved apart from the star background. It was the first planet discovered since ancient times.

Star trails, by Ken Christison
FAQs | Mar 12, 2015

What are star trails? How can I capture them?

As Earth spins under the sky, the stars appear to move. When a camera captures that movement, that’s called a star trail. Plus … an astrophotographer explains how he does it.

Image credit: UNH-EOS
Science Wire | Mar 12, 2015

Watch MMS spacecraft launch March 12

A stack of four identical spacecraft will study Earth’s magnetosphere – the comet-shaped magnetic shield that protects us from “space weather.” Watch the launch.

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Science Wire | Mar 11, 2015

Earth-directed solar X-flare March 11

The sun has been relatively quiet, and this is the first X-flare of 2015. It caused a brief radio blackout at some frequencies. Possible aurora alert ahead.

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Science Wire | Mar 10, 2015

Video: Dance of the Northern Lights

A quiet night for auroras at Churchill, Manitoba, Canada – located at at 58° North, under the auroral oval – is a spectacular auroral display for most of us.

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Science Wire | Mar 08, 2015

Dusty galaxy in the early universe

A very early galaxy containing what astronomers call “dust” – elements such as carbon, iron and oxygen – raw materials for making planets.

This artist's conception shows the 30 Ari system, which includes four stars and a planet. The planet, a gas giant, orbits its primary star (yellow) in about a year's time. Image copyright: Karen Teramura, UH IfA
Science Wire | Mar 07, 2015

Distant planet has four suns

Were it possible to see the skies from this world, the four parent stars would look like one small sun and two very bright stars visible in the daylight.

NASA scientists have determined that a primitive ocean on Mars held more water than Earth's Arctic Ocean and that the Red Planet has lost 87 percent of that water to space. Image credit: NASA/GSFC
Science Wire | Mar 07, 2015

Mars lost ocean of water to space

About 4 billion years ago, a primitive ocean on Mars held more water than Earth’s Arctic Ocean, say researchers, but Mars has lost 87 percent of it to space.

Photo credit: Oliver Floyd
FAQs | Mar 07, 2015

How often does a solar eclipse happen on the March equinox?

There’s a total solar eclipse coming up at this month’s equinox. When is the next one after this, and how often do we get an equinox-eclipse?