The Galilean moons Of Jupiter
By: D. Vogt
The four Galilean moons of Jupiter are Io, Europa, Ganymede, and Callisto. Although Jupiter now has 63 known moons, these four are the largest and best known, having been first discovered by Galileo Galilei in 1610. These are among the largest and heaviest moons in...
By: D. Vogt
A black hole is one of the theoretical remnants of a dying star - one so large that the collapsing core left behind after its explosive supernova is so gravitationally powerful that even light cannot escape. At present there are no confirmed black holes, but...
Defining a neutron star
By: D. Vogt
A neutron star is a type of dead star, or stellar remnant, which forms during the death of a star much larger than our own, but smaller than the massive blue giants which (it is believed) collapse into black holes. The resulting neutron stars are...
The existence of space and time warps
By: Terrence Aym
Eclipse proves space warps existThe first experiment to test Albert Einstein's 1915 assertion of warped space—embodied within his general theory of relativity—occurred on May 29, 1919 during a solar eclipse. The calculations made after the observation proved that mass warps space. In the...
Past missions to Saturn
By: D. Vogt
Saturn has become one of the best-known of the gas giants because of the lengthy and continuing Cassini mission, so in a way it is surprising that relatively few space probes have actually reached this majestic planet. On the other hand, of course, the challenges...
The influence of Nazi rockets on space exploration
By: D. Vogt
In a sense, modern space rocketry owes its genesis to Nazi Germany - an uncomfortable and somewhat disturbing thought. Although rocket inventors and experimenters existed in many industrialized countries during the early twentieth century, the early Cold War space programs of both the Soviet Union...
The most intense supernova in recorded history
By: D. Vogt
The most intense supernova in recorded history occurred in the year 1006 A.D., when a massive supernova occurred on April 30 and was bright enough to be recorded over a period of several months as it gradually dimmed. Today astronomers have been able to...
By: Chris Pine
The Spring Equinox has been an important time of the year for many cultures throughout history. Equinox literally means “equal night”, and the Spring Equinox is the time when the day and the night on the equator are of equal length. This astrological event...
What happens during the lifespan of a star
By: D. Vogt
All stars follow essentially the same life cycle, although they vary widely in terms of their size, mass, brightness, temperature, and in some small ways their chemical composition (referred to as metallicity). First, they form out of giant molecular clouds, amassing enough size that they...
Colonizing Mars
By: Edgar Craven
Man living on Mars? Is it likely? Is it even feasible? Is it morally acceptable, considering humankind's natural talents for consumption? I agree. It sounds a little crazy. A little extreme even. However, in the inevitable case when life on Earth may cease, whether Doomsday...

 

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