Earth
But it was only in the sixteenth century, around the time of Copernicus, that people began to see Earth as […]
Scale Models
Without being informed of the expected product, the students will make a Play-doh model of the Earth-Moon system, scaled to
Why is the Moon covered with craters?
Perhaps a better question might be why isn’t Earth covered with craters? Both Earth and Moon — and the other
Why is the Moon covered with craters? Read More »
What causes the bright halo that sometimes surrounds the Moon?
This bright ring of light is quite common. It’s related to the same process that creates rainbows: refraction. In this
What causes the bright halo that sometimes surrounds the Moon? Read More »
Who built the first observatory?
Observatories, like so much of astronomy, are truly ancient features of human culture; retracing the steps of the first person
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Why does the Moon look bigger at the horizon?
The “Moon illusion,” in which the Moon appears larger than normal when close to the horizon, is not the result
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What causes tides?
For the most part, the rise and fall of the tides is caused by the gravitational influence of the Moon.
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How often do all the planets line up?
Alignments of the fast-moving inner planets can occur as regularly as every few months or so, while groupings of the
How often do all the planets line up? Read More »