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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 th...

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 ...

Mars - The Dying Planet Astronomers have been exploring Mars with telescopes for four centuries, and the fascination of the red planet with its ...

Russian biologist A. P. Oparin and Scottish biologist J. B. S. Haldane both proposed an early reducing atmosphere on Earth consisting of hydr...

The Viking Experiments In the early 1960’s, long before humans had left low Earth orbit, NASA was planning a mission to Mars that would soft-...

Sketching Saturn: The Box and Rectangle Method The first discoveries the system of the rings and moons around Saturn predate photographic tec...

Saturn has 7 major moons and more than 70 known moonlets. For the amateur astronomer, detecting and identifying these major moons is a challe...

We normally think of galaxies as some of the largest, brightest structures in the universe – but that isn’t always true. It is star formation t...

Ultra-diffuse galaxies are generally quenched dwarf galaxies with no gas reservoirs, they are therefore unable to form new stars; as a result, ...

The universe has always been mysterious and strange to us, but in fact it may be stranger than we can ever fathom. In this episode of How Do You...

In the second part of Dr. Barth's discussion on dark matter, he touches on why did galaxies form, the missing matter problem, and the Great Attr...

In this episode, Dr. Barth discusses the the difference between persuading someone to accept your opinion in an argument and arguing from eviden...

The creation of Earth's Moon is an age old question. There are pre-Apollo mission theories, of which three of the most popular ones will be d...

It's estimated that we will colonize Mars by 2050. The challenges to make it happen are daunting.  Dr. Barth touches on some of the problems tha...

Dr. Daniel Barth returns with the 33rd episode of 'How Do You KNOW?' to discuss the Three Ring Theory that explains the formation of our solar s...

Dr. Daniel Barth gives us an overview of and will answer your questions about the James Webb Space Telescope in this 34th Episode of How Do You ...

Dr. Daniel Barth gives us an overview of and will answer your questions about Lagrange Points in this 35th Episode of How Do You KNOW? https://e...