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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.
This is a group of photographs taken of Eros by the NEAR spacecraft during its approach.
Click on image for full size
The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland.

Near Earth Asteroid Rendezvous

The Near Earth Asteroid Rendezvous (NEAR) spacecraft is the first one to ever orbit an asteroid. NEAR was launched in 1996, and finally reached Eros on February 14, 2000. On its way to Eros it flew by asteroid Mathilde for a quick look.

Eros is one of the largest asteroids near Earth. It was discovered in 1898. Eros is large enough to have a small gravitational pull, which allows NEAR to stay in orbit. The mission was one of the first to be a part of the Discovery Program, a low cost exploration program set up by NASA.

NEAR has six instruments that it will use to study Eros. An imager will take photographs, a magnetometer will search for a magnetic field, and spectrometers will analyze the asteroid's makeup. The goals of the mission are simple; learn as much as we can about these miniature planets.

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Traveling Nitrogen Classroom Activity Kit

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

NEAR Flyby of Asteroid Mathilde

On June 27, 1997, the NEAR spacecraft passed very close to the asteroid Mathilde. NEAR stands for Near Earth Asteroid Rendevous. Mathilde is a large asteroid. Its diameter was estimated to be 60 km. That...more

The Magnetic Field

The force of magnetism causes material to point along the direction the magnetic force points. As shown in the diagram to the left, the force of magnetism is illustrated by lines, which represent the force....more

Cassini

A spacecraft named Cassini will study the planet Saturn for several years. Cassini blasted off from Earth in October 1997. After flying past Venus, Earth, and Jupiter, Cassini finally arrived at Saturn...more

MESSENGER

The MErcury Surface Space ENvironment, GEochemistry Ranging mission (MESSENGER) was chosen as the next mission to Mercury. The Mariner 10 spacecraft last visited Mercury in 1975. Since then, scientists...more

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