Guide to Space
Picture of Earth from Space
Looking for a picture of Earth from Space? Here is a collection. [/caption] Here's a spectacular image of the earth…
The Arctic Circle
[/caption] The Arctic Circle is a region on Earth that is marked as one of the five major circles of…
Summer Solstice
The summer solstice occurs once a year, and there is also a winter solstice each year. During both solstices, the…
Astrolabe
[/caption] An astrolabe is an ancient tool used in solving problems that involve time and the position of the Sun…
Pyramids On Mars
[/caption]The Pyramids on Mars are hills or mountains on the surface of Mars that, from a low resolution image, have…
Black Dwarf
[/caption] A black dwarf is a white dwarf that has cooled down to the temperature of the cosmic microwave background,…
Earth’s Circumference
The Earth's circumference - the distance around the equator - is 40,075 kilometers around. That's sounded nice and simple, but…
Chandrasekhar Limit
[/caption] When a human puts on too much weight, there is an increased risk of heart attack; when a white…
Interesting Facts About Comets
[/caption]There are many interesting facts about comets. Some are about the different parts of the comet, others are about the…
What Are Comets Made Of?
[/caption]What are comets made of? Good question! Comet nuclei are loose collections of ice, dust and small rocky particles, ranging…