Dark Matter Evidence: Rotation, Lensing & the CMB
A clear guide to dark matter evidence—from galaxy rotation curves to gravitational lensing, the CMB, and structure formation—plus searches and alternatives.

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.
A clear guide to dark matter evidence—from galaxy rotation curves to gravitational lensing, the CMB, and structure formation—plus searches and alternatives.
Learn how to choose, set up, and use a Dobsonian telescope. Aperture, eyepieces, collimation, light pollution tips, and realistic observing targets.
How to calibrate microscope measurements using stage micrometers, eyepiece reticles, and camera pixels. Add accurate scale bars and field of view.