By: Heather Brennan
The Wilkinson Microwave Anisotropy Probe (WMAP) was launched in June of 2001. At the time, cosmologists hoped it would add to the knowledge gained by the Cosmic Background Explorer (COBE) that had been launched in November of 1989. Little did they know it would revolutionize...
What is a Dyson Sphere?
By: henry kerchief
Dyson spheres are ranked with space elevators and warp drives when it comes to far-fetched ideas and lack of public support, in part because of several variants, with a broad spectrum of feasibility and efficiency, that are floating around, and in part because the most...
In terms of cosmology, what is meant by inflation?
By: Jeff Maltas
Cosmic inflation is a well supported theory that states the early universe expanded exponentially resulting in several observable consequences. It is important to define the "early universe," as different branches of physicists and cosmologists will use separate time scales. The age of the...
By: Kaye Wilkes
NASA has plans for an asteroid that will be passing near the Earth. The plan is to put it in orbit around the moon. By doing so, scientists hope to be able to study it and thereby learn more about the wider universe. In addition...
Element facts: Calcium
By: Steven Mars
The element calcium has atomic number 20 in the Periodic Table of Elements, which means it has 20 protons in its nucleus. It is group IIA. Its symbol is Ca and its atomic weight is 40.078. It is an alkaline earth metal. It was...
Asteroid to pass within close proximity of earth
By: Wayne K. Wilkins
The world was breathing a sigh of relief after the recent failed December 21st, 2012 doomsday predictions, hoping that would be it when it comes to apocalyptic theories of world destruction. Then another prediction rears its ugly head from the latest news headlines and tabloids...
A beginner's guide to astronomy
By: Julie Thomas-Zucker
An astronomy guide gives information about the stars, planets, the Sun and Moon and how to view them. A good astronomy course covers telescopes and how they work. Also, timelapsed photos from space show distinct colors not seen by the naked eye.MapsMost guides come...
Product review: Celestron PowerSeeker 60AZ Telescope
By: Julie Thomas-Zucker
The Celestron Powerseeker 60Az Telescope provides excellent land views. However, it does give a beginner a clear image of the moon. The lens is only 60 mm, which does not provide a large enough area to see distant sky objects. It comes with a lightweight...
Why Galileo's use of the telescope got him into trouble with the Inquisition
By: John Welford
Galileo Galilei (1564-1642) is well known for having dared to defy the Roman Catholic Church by agreeing with the theory, formulated in 1512 by the Polish astronomer Nicholaus Copernicus (1473-1543), that the planets including Earth orbited the Sun. Galileo paid for his “heresy” by...
Guide to orbiting satellites
By: Usama Muneeb
A satellite is any orbiting object that has been placed in orbit by human effort. Sometimes they are also referred to as artificial satellites, to distinguish them from natural orbiting objects such as the moon. Satellites serve us day and night. When you call someone...

 

1 531 532 533 534 535 547
CHOOSE YOUR SCIENCES 360 TOPIC: