Under $200

This activity is larger, messier, and a lot more fun that the clay model we made in Episode #4. In the last activity, we pressed various s...

It is said that familiarity breeds contempt, and this certainly is true of the Moon. Many astronomers despise the Moon as a bright lamp that ...

“How powerful is that telescope?” is more often than not the first thing out of a person’s mouth when they see a large telescope. To the uniniti...

Legend has it that a young Galileo observed the swinging of a censer (incense holder) in church one day and noted that the incense burners kept swi...

We’ve all heard the story – Isaac Newton sat in his garden under an apple tree, looking up at the waning gibbous Moon in the early morning sky. An ...

One of the great problems with teaching visual astronomy, or introducing anyone new to the activity, is simply the great number of images that we a...

Dr. Barth elaborates on one of the persistent problems with standards-based STEM curriculum is the emphasis upon the Learn, Believe, Repeat methodo...

Dr. Barth elaborates on one of the persistent problems with standards-based STEM curriculum is the emphasis upon the Learn, Believe, Repeat met...

Learn astrophotography processing techniques through 1-hour Astro Courses with Master MENTOR and astrophotographer Gary Palmer.  An Explore Allianc...

Explore Scientific's Explore Alliance is honored to present the Global Star Party (GSP), where you can participate in a global live simulcast t...

This is the genuine replacement Mounting Base for the Telrad Reflex Sight. There are holes to bolt on the base, or you can use the double-sided foa...

These Riser Bases will position the Telrad Reflex Sight to a higher position off the telescope tube assembly to clear obstructions on the tube asse...

When dew forms on the optics of your telescope and viewfinder, it makes it virtually useless for observing or astrophotography. Dew shields and oth...

Jupiter is well named after the King of the Gods in Greek mythology, it is the largest planet in both mass and size, and possesses the ...

Misconceptions about large numbers are some of the most persistent and troublesome bits of misinformation. Not just children, but a lar...

The idea that tides are linked to the Moon is an old one. Galileo was one of the first scientists to develop the idea of tides being...

The French mathematician and astronomer, Edouard Roche, is most famous for his work on celestial mechanics and his discovery of t...

We all know that the gravitational field of any moon causes tides on its home planet. The height of the tide for a moon also depends upon the natur...

In August of 2006 the International Astronomical Union famously downgraded Pluto, which was considered the 9th planet in our solar system, to be re...

If you study science long enough, you eventually discover that Galileo was right about the constantly changing nature of scientific knowledge. Y...

There is a misconception that ‘doing real astronomy’ is difficult and expensive, only highly trained and generously funded people can do it; ...

Humans have attempted to map the stars in the sky since antiquity.  The earliest Western catalog of stars was created by the Greek astronomer...

  Fact, Hypothesis, Theory There is a distinct hierarchy in science that distinguishes facts, hypotheses, and theories. We misunderstand and ...