How We Know Dark Matter Is Real: Rotation, Lensing, CMB
From galaxy rotation curves and gravitational lensing to the CMB and structure formation, explore the strongest, multi-scale evidence for dark matter.

Guides to help with your Stargazing Adventure

Information on Galaxies, Stars, Constellations, Planets, Moons, Comets and Asteroids
Listen to Bernard Miller describe his journey into AstroPhotography and detail how he captured this stunning image of the Sculptor Galaxy.
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Drew Evans talks about his passion for astrophotography, the equipment used and tips for post processing image data.
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Hear D.j Van Bourgondien as he talks about using his Celestron EdgeHD 8″ telescope to capture this image of the Fireworks Galaxy
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Below are a selection of our Articles, to find more click on one of the sections above, or use the Menu at the top of the page.
From galaxy rotation curves and gravitational lensing to the CMB and structure formation, explore the strongest, multi-scale evidence for dark matter.
Explore the Orion constellation: how to find it, bright stars, Orion Nebula (M42), Horsehead, gear tips, star‑hopping routes, and astrophotography advice.

When looking into a microscope, having the best magnification is only one part of getting the most precise picture. You also need accurate lighting that can adjust to accommodate your ability to see your specimen. That is where the rheostat microscope function comes into play. Do you know what the rheostat is or why it