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Posts by Deborah Byrd

Saturn's rings, and two of its moons, Mimas and Pandora.  Image via Cassini spacecraft.
Science Wire | Oct 13, 2015

Two very different Saturn moons

One moon is small and irregular, and the other is larger and round. These two moons typify the sorts of objects you see throughout our solar system.

Composite image of an edge-on spiral galaxy with a radio halo. In this image, the large, grey-blue area is a composite of the radio halos of 30 different galaxies,. At the center is a visible-light image of one of the galaxies, NGC 5775. This visible-light image shows only the inner part of the galaxy's star-forming region, outer portions of which extend horizontally into the area of the radio halo.  Image via Jayanne English, Judith Irwin and Theresa Wiegert ; CHANG-ES consortium, NRAO/AUI/NSF; NASA/STScI
Science Wire | Oct 13, 2015

Spectacular halos around nearby galaxies

Astronomers announced this week that halos of cosmic rays and magnetic fields – above and below the disks of galaxies – are more common than they thought.

Shock waves streaming from a jet flying at supersonic speeds. The  jet is passing in front of the sun, and dark sunspots are also visible.   Image via NASA.
Today's Image | Oct 13, 2015

Seeing a jet’s shock wave

If you could see the shock wave from a jet moving faster than sound, this is what it would look like.

Tonight | Oct 13, 2015

See Sirius, the sky’s brightest star

In October, before dawn, look for a brilliant beauty of a star. Orion’s Belt points to Sirius, the brightest star in the nighttime sky.

Hubble Space Telescope image of Proxima Centauri, the closest known star to the sun.  Read more about this image.
Science Wire | Oct 12, 2015

This date in science: Discovery of Proxima Centauri

Happy anniversary, Proxima Centauri! Today is the 100th anniversary of the announcement that this star is next-nearest to our sun.

October fogbow over the Pacific, by Jim Grant
Science Wire | Oct 12, 2015

What is a fogbow?

Fogbows are rainbows’ cousins – made in much the same process – but with the small water droplets inside a fog instead of larger raindrops.

Visitors pack into an artificial wave pool at a resort in Daying county in Sichuan province, China.
China Daily/Reuters. View images of World Population Day 2015 from ibtimes.co.uk.
Science Wire | Oct 12, 2015

This date in science: 6 billion humans and counting

In 2011, global population reached 7 billion mark. Today – October 12, 2015 – it stands at more than 7.3 billion, according to United Nations estimates.

Photo by Zlatko Orbanic
Today's Image | Oct 12, 2015

Wonderful solar halo over Croatia

High above Earth, tiny ice crystals create halos by refracting and reflecting the light of the sun or moon.

Tonight | Oct 12, 2015

Tonight, find the Andromeda galaxy

You can find the Andromeda galaxy — closest major galaxy to our Milky Way — by star-hopping from the Great Square of Pegasus.

Science Wire | Oct 11, 2015

Video: Paddle boarding with whales

Touching juxtaposition of a classic John Lennon song with a magnificent video of whales. Video by Jaimen Hudson.