- 18 January 2010
Our solar system is an awesome sight and contains an array of planets, moons, stars, comets, and asteroids, along with the Sun. All of the planets in the solar system revolve around the Sun, which is itself a giant star. But this is not all there is to outer space. The Sun revolves around the center of our galaxy, the Milky Way, and the Milky Way is just a small part of a larger group of galaxies. The area of space occupied by our solar system is tiny when compared to the rest of outer space and the Universe, which contains billions of other galaxies.
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- 10 January 2010
For thousands of years, astrologers have been studying the sun, the moon, and the stars. There have been theories about how the planets revolved around the earth or the sun, how they effected the earth’s own tides, and there have been discoveries of new planets. Here is an overview of the history of astronomy.
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- 15 December 2009
A chronology is an arrangement of historical events according to their dates of occurrences. Chronologies are very useful as they enable people to understand and appreciate history. In education, chronologies assist scientists and historians in their attempts to estimate the ages of certain objects, theories, or plant and animal species. They also promote understanding of various historical cultures and help scholars evaluate the relationships between events that happened in the past and those of the present and future.
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- 15 December 2009
Astronomy is the study of the universe. Our location in the universe is in a spiral galaxy called the Milky Way. Our solar system, housing just one star, the sun, eight planets and a few smaller entities, which are not planets, but more like moons, orbit it in elliptical, tilted orbits. Our home planet, Earth, lies 93 million miles away from the sun and has one satellite, the moon. The sun lights half of Earth at one time, giving us day. The moon lights the other half of Earth, giving us night. Humans have always looked to the sun and the moon to know what day and time it is, even what season it is.
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- 6 December 2009
Space exploration refers to outer space travel for the purpose of scientific research and observation. Until 1958 space exploration was considered purely a military venture, but in 1958, the United States Government launched the National Aeronautics and Space Act to regulate all activities that pertain to space exploration.
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- 18 November 2009
Impact cratering is the result of a collision between a meteoroid and a larger, planetary object. The planet will most likely survive the impact, but a scar, or crater, will be formed on its surface. Meteoroids impact all of the planets in the solar system, even gaseous planets like Jupiter. Because of Jupiter’s less-than-solid surface, the craters are only visible for a short time. The surfaces of Mercury and earth’s moon are covered with impact craters. Mars has seen significant impact cratering, but because of strong winds, many have eroded. The earth has impact craters, but because of its atmosphere and geological activity, a meteoroid is either burned up before the collision or the resulting crater erodes over time.
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- 12 November 2009
Greek mythology refers to the entire corpus of fantastic and heroic stories used by ancient Greek people to make sense of the world in which they lived. Though they are studied now mainly from a literary and cultural perspective, for the people of the classical Greek world, they were the facts of religious life. Greek mythology was intricately bound up in notions of cosmology, the study of the origin and nature of the universe.
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- 12 November 2009
Astronomers study our universe and the objects found within it such as stars, planets, and galaxies like the one we live in, the Milky Way. Almost one quarter of all astronomers are women and almost all professional astronomers work in the field of government or education.
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- 12 November 2009
One of the most intriguing mysteries in the world is the Stonehenge. Nobody knows who built the mysterious ring of rock in Wiltshire, England or what its purpose was exactly. There are many theories associated with Stonehenge and archaeologists have been debating for ages to determine why it was built. Most experts believe that Stonehenge is actually an ancient astronomical calculator.
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- 12 November 2009
A black hole in space is what forms when a star of massive size collapses. One of the main characteristics of a black hole is the tremendous power of its gravitational pull. This pull is so strong that nothing can escape it, not even light. The sphere-shaped boundary of a black hole in space is referred to as its event horizon. If a star or another object moves close to the event horizon it will be absorbed into the black hole and will not reemerge. The amount of mass in a black hole varies. Some black holes have a larger mass than the sun. Overall, they are known for the density of their formation.
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