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  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
  • Massive Tornado Outbreak on Tornado Alley
    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Io...Read more

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    Massive Tornado Outbreak on Tornado Alley

    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Iowa, Illinois and Missouri. On May 20th, a massive tornado struck Moore, Oklahoma, devastating communities - destroying over 100 homes and hitting two elementary schools and a hospital - with many casualties and deaths. Our thoughts are with our friends and colleagues suffering from these storms. For more on the May 20th storms, see the NOAA Storm Prediction Center Storm Report.
  • Kansas Legislator Proposes Bill to Outlaw Sustainability Education
    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of ...Read more

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    Kansas Legislator Proposes Bill to Outlaw Sustainability Education

    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of sustainability. Here is a link to the one-page bill: http://www.kslegislature.org/li/b2013_14/measures/documents/hb2366_00_0000.pdf. See report on Bloomberg News.
Andromeda is an autumn constellation found next to Pegasus.
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Andromeda

Andromeda is a "V" shaped constellation best viewed in Autumn if you live in the Northern Hemisphere. It was one of the earliest constellations to be recognized. Andromeda lies near the celestial north pole, so only a few in the Southern Hemisphere can see this strangely shaped constellation in the spring.

The myth of Andromeda is easily found in Greek mythology. Andromeda's mother, Queen Cassiopeia, bragged that she was prettier than the sea nymphs. The nymphs complained to Poseidon, who in turn sent a monster to destroy her land. The queen and her husband, King Cepheus, were told to sacrifice their daughter to save the country.

Andromeda was chained to a cliff for the monster, called Cetus. Just as the monster was ready to bite down on the maiden, Perseus rescued her. He used Medusa's head to turn Cetus into stone. Perseus and Andromeda were put in the sky along with Cepheus, Cassiopeia and Cetus.

Andromeda is right next to Pegasus, which leads some to believe that at one time, some of these stars used to be part of the winged horse. The Princess' head is the star Alpheratz, which is also the last star in Pegasus. The image shows Andromeda upside-down, which is often her position in the sky.

There is plenty to see in this fall constellation. With the help of a telescope, you can find two faint open clusters. NGC 752 is located to the left of Andromeda, while NGC7686 is in the upper right corner, above Pegasus. The Great Andromeda Galaxy is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. There are several other galaxies located around the Princess, but most are too faint to see, even with a telescope.

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The Summer 2010 issue of The Earth Scientist, available in our online store, includes articles on rivers and snow, classroom planetariums, satellites and oceanography, hands-on astronomy, and global warming.

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Cassiopeia

Cassiopeia was the wife of King Cepheus. She was very pretty, and would often boast that she and her daughter were more beautiful than the sea nymphs, the Nereids. They complained to Poseidon, who unleashed...more

King Cepheus

Cepheus is one of the oldest constellations in the night sky. He is a circumpolar constellation, circling around the North Star all year long. This house-shaped constellation is named after an ancient...more

Constellations

Many cultures have seen distinctive patterns, called constellations, formed by the stars in the heavens. Constellations are usually comprised of bright stars which appear close to each other on the sky,...more

Northern Hemisphere Constellations

Many different constellations fill the evening sky in the northern hemisphere. Depending on your location and the season, different constellations can be seen. Northern circumpolar constellations can be...more

Southern Hemisphere Constellations

Many different constellations fill the evening sky in the southern hemisphere. Depending on your location and the season, different constellations can be seen. Southern circumpolar constellations can be...more

Carina

The constellation Carina is known as the Keel, which is the bottom part of old ships. Carina was originally a part of Argo Navis, which was a huge boat in the night sky. It has since been divided into...more

It All Depends On Your Point Of View

In most cases, however, the stars that we see that seem to be "close" to each other actually are quite far apart, some stars are much closer or farther than others as is shown in the example below of Ursa...more

As the World Turns

In our time, scientists (and most people!) know that the constellations seem to move across the sky because the earth rotates on its axis. What, you may ask, does the turning of the earth have to do with...more

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