Helium.com | View Steven Mars's articles http://www.helium.com/users/281179.xml View Steven Mars's articles en-us Copyright Helium.com Thu, 09 Feb 2012 06:07:24 GMT Thu, 09 Feb 2012 06:07:24 GMT A barometer is a meteorological instrument that measures atmospheric pressure. Meteorologists (scientists who study the weather) use barometers to... http://www.helium.com/items/2289872-how-are-barometers-used-to-forecast-the-weather Thu, 09 Feb 2012 06:07:24 The aurora is a luminous glow that occurs in the Earth’s upper atmosphere. The diffuse aurora cannot be seen from the ground because it is f... http://www.helium.com/items/2289447-aurora-borealis Thu, 09 Feb 2012 06:07:23 Ambrosia and nectar were the food and drink of the gods in Greek mythology. Doves carried ambrosia to Zeus god of the sky and thunder and the elev... http://www.helium.com/items/2290026-greek-mythology-what-were-nectar-and-ambrosia Thu, 09 Feb 2012 09:07:30 The astronomical unit is the mean distance from the Earth to the Sun. The mean is the average. It is about 92,955,807.3 miles. The International A... http://www.helium.com/items/2288643-what-is-an-astronomical-unit-au Mon, 06 Feb 2012 07:07:19