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News for Norther Colorado and the world

Friday, November 28, 2014

Posts Tagged ‘Sirius’

Sky Tonight—May 1, Star hopping from constellation

Sky Tonight—May 1, Star hopping from constellation Orion

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org Rebecca wrote, “What is ‘star hopping?’ What does that mean?” Rebecca, amateur astronomers use star hopping to go from stars and constellations they know … to ones they do not know yet. First, look for noticeable patterns on the sky’s dome. One very easy pattern to find at this time of year is the constellation Orion the Hunter. You will find it descending in the west after sunset. Orion is ... Full Story

Sky Tonight—March 26, Is Sirius the most luminous

Sky Tonight—March 26, Is Sirius the most luminous star in the sky?

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org Look southward at dusk and nightfall, and you can’t miss Sirius, the brightest star in the nighttime sky. Mia asks, “Isn’t there a brighter star in absolute magnitude which appears dimmer because of its distance?” Yes, Mia, you are right. Sirius, in the constellation Canis Major (the Greater Dog), looks extraordinarily bright in Earth’s sky because it is only 8.6 light-years away. Many stars on ... Full Story

Sky Tonight—March 13, Moon shines in front of Winter

Sky Tonight—March 13, Moon shines in front of Winter Circle

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org As seen tonight from all over the world, the moon passes right in front of the great big loop of stars known to northern hemisphere residents as the Winter Circle or the Winter Hexagon. This huge star formation makes even the constellation Orion the Hunter look small. Orion sits in the southwest (lower right) corner of the Winter Circle. The Winter Circle is an asterism – a group of stars that is NOT a ... Full Story

Sky Tonight—March 4, Bright star Arcturus is a

Sky Tonight—March 4, Bright star Arcturus is a harbinger of spring

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org The gloriously bright star Arcturus rises into your east-northeastern sky around 9 p.m. tonight. This yellow-orange beauty – like any brilliant star – sparkles wildly when it hovers near the horizon. Arcturus is the brightest star in the constellation Bootes, which represents a Herdsman – though to our modern eyes, this star formation might look more like a kite or snow cone. Arcturus is the fourth ... Full Story

Sky Tonight—Feb 19, The Hare and the Dove below the

Sky Tonight—Feb 19, The Hare and the Dove below the Hunter

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org If you look south around 8 p.m., you will easily notice a short, straight row of three medium bright stars. These stars represent the Belt of Orion the Hunter. Also, notice the star Sirius. Sirius: Dog Star and brightest star On old sky maps, the mighty Hunter of the ancient myths is seen poised with an upraised club and shield, as though fending off the raging Bull, Taurus. Jupiter is the bright ... Full Story

Sky Tonight—February 13, Moon points the way to

Sky Tonight—February 13, Moon points the way to Winter Circle

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org Tonight’s waxing gibbous moon resides inside the Winter Circle – an incredibly large star configuration made of six brilliant winter stars. Be sure to notice the variety in the colors of these stars. The Winter Circle – sometimes called the Winter Hexagon – is not one of the 88 recognized constellations. Rather, it is an asterism – a pattern of stars that is easy to recognize. Our sky chart ... Full Story

Sky Tonight—February 1, For those at southerly

Sky Tonight—February 1, For those at southerly latitudes, Canopus!

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org Here is a star that northern stargazers rarely see. It is Canopus, and it is the second-brightest star in the entire sky. You will not see this star from the northern U.S. or similar latitudes. However, northern skywatchers who travel south in winter – or people in latitudes like those in the southern U.S. – enjoy watching this star. You can always find Canopus by first locating Sirius, the sky’s ... Full Story

Sky Tonight—January 21, Identify the Winter Circle

Sky Tonight—January 21, Identify the Winter Circle and winter’s brightest stars

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org Tonight’s chart covers a wider area of sky than what we typically show. It is in answer to a reader in Nashville, who wrote, I have heard mention of the Winter Circle of Stars. Could you list the stars in this circle? You will find these stars at this time of year by looking east-southeast at early to mid evening. Again, this is a large pattern and covers a wide area of sky, but as always, it is ... Full Story

Astronomy Photo of the Day

Astronomy Photo of the Day

The Seagull Nebula Image Credit & Copyright: Michael Sidonio Explanation: This broad expanse of glowing gas and dust presents a bird-like visage to astronomers from planet Earth, suggesting its popular moniker - The Seagull Nebula. This portrait of the cosmic bird covers a 1.6 degree wide swath across the plane of the Milky Way, near the direction of Sirius, alpha star of the constellation Canis Major. Of course, the region includes objects with other catalog ... Full Story

Sky Tonight—January 11,Two stars flag sun’s path

Sky Tonight—January 11,Two stars flag sun’s path through Milky Way

Courtesy of EarthSky A Clear Voice for Science Visit EarthSky at www.EarthSky.org You can use the brilliant star Sirius – and the star Vega – to imagine the direction our sun and solar system are traveling through space. The sun in its orbit is traveling away from Sirus and toward the star Vega. Although we could not fit them both on one chart, Vega shines over your northwestern horizon, opposite Sirius, at nightfall at this time of year. If you stand outside in early evening with ... Full Story

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