Under $500

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

FREE Explore One 30mm Compact Binoculars, when purchasing an Explore Science STEM product. To activate this promotion, add both items to your cart ...

FREE Explore One 30mm Compact Binoculars, when purchasing an Explore Science STEM product. To activate this promotion, add both items to your cart ...

FREE Explore One 30mm Compact Binoculars, when purchasing an Explore Science STEM product. To activate this promotion, add both items to your cart ...

FREE Explore One 30mm Compact Binoculars, when purchasing an Explore Science STEM product. To activate this promotion, add both items to your cart ...

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-...

Description   This model does not come with the adapters that allow for a direct screw-on connection to a camera. It can be used with a camera by ...

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...

Description Dual plug (DB9 FTDI chipset and USB 2.0 Mini B) works with PMC-Eight OPENGoTo systems, allowing ASCOM communications between a compute...

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, ...

Features Flashlight mode has a low beam option that illuminates up to 40 meters and a high beam option that reaches up to 100 meters Floodlight m...

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...

The L-eXtreme is a two-band filter and the ideal choice for strong suppression of light pollution. It enables astrophotos of objects with narrow-ba...

Features Dark-Sky filter Contrast increase in aurora & deep-sky photography Reduction of stray light from street lights, for example Wide-ang...

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...

Features High quality Explore Scientific O-III filter Let only the oxygen emission lines "through" Absorbs all other emission lines Absorbs almo...

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...