Galaxies: Types and classifications
By: Jason Westley
Structure in the universe can be observed over a vast range of distances. At the smaller end are the solar systems. Not only are the earth and other planets orbiting the sun, but telescopes have now revealed other suns with their own planets, many light-years...
Overview of globular clusters
By: John Welford
Globular clusters are spherical clusters of stars that typically contain a few hundreds of thousands of stars, or even as many as a million. They are not galaxies, but are associated with galaxies in that they orbit around the galactic plane in a spherical halo...
Galaxies: Types and classifications
By: John Welford
Nobody knows how many galaxies there are in the Universe, but astronomers talk in the hundreds of billions, only a tiny fraction of which have been observed from Earth. Between 2000 and 2008, the Sloan Digital Sky Survey produced images of around a million galaxies...
A brief history of the Hubble Space Telescope
By: Jason Westley
The Hubble Space Telescope is one of the most successful pieces of scientific equipment ever built. Although expensive, since its launch over 20 years ago, Hubble has generated an incredible quantity of new science. Topics in astronomy which have benefited from Hubble data include the...
A brief history of the Apollo lunar missions
By: Vicky Ann Smith
Apollo is one of the most famous names in the history of spaceflight, from 1963 to 1972 the Apollo program was built to carry the Saturn satellites on their journey into deep space and later focused to aim landing people on the moon, exploring the...
Speculating on more manned moon landings
By: Anthony Megna
Why should the Moon be the next target of exploration? NASA has already sent manned missions to the Moon, and the astronauts have already brought back to Earth many pounds of rocks from our nearest orbiting neighbor. In fact, scientists are still studying those rocks...
A look at the characteristics of Jovian planets
By: Vicky Ann Smith
The Jovian planets are four planets in the outer atmosphere also called ‘Gas Giants’, Jupiter, Saturn, Neptune and Uranus. Made up of a mixture of gases, primarily hydrogen and helium, they are unique in their chemical compositions with many differences to rock-based planets, the...
A brief history of the Hubble Space Telescope
By: Vicky Ann Smith
Seeing into space was a challenge overcome by the invention of telescopes; they allowed us to view objects close to the Earth’s atmosphere. This barrier which protects us from harmful radiation also creates an atmospheric distortion, the twinkling of the stars and a problem...
By: John Traveler
It’s only been about ninety years since the then new 100 inch Hooker telescope was installed at the Mount Wilson observatory in California. It was the largest telescope built to that point and would reveal whole new dimensions of human cosmic understanding. It resolved...
By: Jason Westley
The geocentric model of the solar system (and indeed of the universe) asserts that the earth sits, unmoving, at the centre of all existence. Every other object in the sky revolves around the earth, following paths dictated by a variety of mathematical rules - some...

 

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