Current Events

  • 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.
This is a picture of Nereid.
Image from: NASA

Nereid

Nereid was discovered by G. Kuiper in 1949. Of the 8 moons it is the farthest from Neptune. Nereid is one of the small moons, and is about as long as the distance from Los Angeles to San Francisco. As a small moon, the composition and surface features are unknown.

Shown in the picture above is Nereid. This is the best picture we have of this small moon!

Last modified November 13, 2000 by Jennifer Bergman.

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Science, Evolution, and Creationism

How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more

Neptune's Moons and Rings

Neptune has // Call the moon count function defined in the document head print_moon_count('neptune'); moons. It also has rings, but its rings are different from Saturn's. Neptune's largest moon is named...more

Triton

Triton was discovered by W. Lassell in 1846. Of the 8 moons, it is the 2nd farthest from Neptune. Triton may be one of the largest of the icy moons with a diameter that is about half the distance across...more

Triton Composition

Not only ice but several different kinds of snow (crushed ice) have been found on the surface of Triton. An idea of what the inside of Triton is made of can only be guessed because the Voyager spacecraft...more

What the Inside of Triton is like

Triton is mostly made of ice, therefore there is probably a small core of some rocky material at the center, covered with different kinds of ice. If Triton is warm enough inside, then there could be water....more

Surface of Triton

This image of Triton reveals many neat features of its surface. The surface of Triton's surface is a mix of Ganymede's and Europa's surfaces. Old areas of Triton's surface have many craters and younger...more

The Poles of Triton

Triton is the largest moon of Neptune. It is a very odd moon. The poles of Triton are especially interesting. Triton has a polar ice cap at the South Pole. Earth has ice caps at its poles too. On Earth...more

A Look at what Neptune's Atmosphere is Made of

The atmosphere of Neptune is a lot like that of Uranus, and unlike that of Saturn and Jupiter. On Jupiter and Saturn, the atmosphere is mostly made of the simple molecules hydrogen and helium. The atmosphere...more

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Science, Evolution, and Creationism, by the National Academies, focuses on teaching evolution in today's classrooms. Check out the other publications in our online store.

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF