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Posts by Larry Sessions

Constellation Crux photo by Christopher J Picking in New Zealand.  More information about this photo here.  Used with permission
Tonight | Mar 24, 2015

Star of the week: Acrux, brightest star in Southern Cross

You have to be in the Southern Hemisphere to see Crux – the Southern
Cross – in all its glory. Bluish Acrux, aka Alpha Crucis, is its brightest star.

Credit: Russell Croman
Tonight | Mar 18, 2015

Regulus is the Lion’s Heart

Meet Regulus, brightest star in Leo the Lion.

2015-march-11-saturn-antares-moon-night-sky-chart
Tonight | Mar 11, 2015

Moon, Saturn, star Antares before dawn March 12

On March 12, 2015 – before sunup – look for a lovely waning gibbous moon near the planet Saturn and the star Antares in Scorpius.

Golden Pollux
Tonight | Mar 04, 2015

Pollux the brighter Twin star

Being so close together in the sky, Pollux and its brother star Castor are easy to compare. Pollux is brighter and golden in color, while Castor is fainter and white.

Procyon
Tonight | Feb 23, 2015

Procyon is the Little Dog Star

The Dog Star, Sirius, is easy to spot because it’s the sky’s brightest star. Procyon – the other Dog Star – is always near its brighter brother on the sky’s dome.

Castor system via Jeremy Perez
Tonight | Feb 16, 2015

Castor six stars in one

Two stars noticeable for being bright and close together might be Castor and Pollux of the Gemini Twins constellation.

Photo Credit:  A. Dupree, R. Gilliland, NASA
Blogs | Feb 10, 2015

How far is Betelgeuse?

Finding star distances isn’t easy. Here’s how it’s done, and why astronomers recently modified the distance estimate to the famous star Betelgeuse.

Canopus seen from ISS
Tonight | Feb 06, 2015

Will you see Canopus?

Canopus is sky’s second-brightest star and easy to spot on February evenings, if …

Betelgeuse imaged in ultraviolet light by the Hubble Space Telescope and subsequently enhanced by NASA. The bright white spot is likely one of this star's poles. Image via NASA/ESA.
Tonight | Jan 29, 2015

Betelgeuse will explode someday

Someday, the star Betelgeuse will run out of fuel, collapse under its own weight, and then rebound in a spectacular supernova explosion. Someday … but probably not soon.

Capella system, via Atlas of the Universe
Tonight | Jan 13, 2015

Capella is two golden stars

We see Capella as the brightest star in the constellation Auriga the Charioteer. It is really two stars, each with a golden color similar to our sun.