Guide to Space
Hubble’s Law
[/caption] "The distance to objects beyond the Local Group is closely related to how fast they seem to be receding…
Albedo Effect
Astronomers define the reflectivity of an object in space using a term called albedo. This is the amount of electromagnetic…
What is Sagittarius A*?
At the very heart of the Milky Way is a region known as Sagittarius A*. This region is known the…
When Was Mars Discovered?
[/caption] It is impossible to know the answer to ''when was Mars discovered''. It is bright enough to be seen…
K-T Boundary
[/caption]What killed the dinosaurs? That's a question that has puzzled paleontologists since dinosaurs were first discovered. Maybe the global climate…
How Long is a Light Year?
A light year is the distance light can travel in vacuum in one year's time. This distance is equivalent to…
What are Plate Boundaries?
In Plate Tectonic Theory, the lithosphere is broken into tectonic plates, which undergo some large scale motions. The boundary regions…
Destruction of Earth
[/caption] Want to destroy the Earth? It's harder than it sounds. That's because the Earth is held together by the…
VY Canis Majoris
Of all known stars, the VY Canis Majoris is the largest. This red Hypergiant star, found in the constellation Canis…
What Causes Tides?
Tides refer to the rise and fall of our oceans’ surfaces. It is caused by the attractive forces of the…