Speed of light around Earth - video Dailymotion
Refraction at Sunrise & Sunset
Bending light - Can gravity bend light? | Curious Times
The basic nature of light | Nature of light | Photon terrace
NASA — How Gravity Warps Light
How does the sun bend light? - Quora
Can Planets Bend Light?
General Relativity Experiments
Understanding gravity—warps and ripples in space and time - Curious
ASTRO-020S: Resources and Links
Flat Earth Challenge Follow-Up: Refraction | Science Meets Fiction
Does light follow the curvature of the Earth, or does it just shoot out to space? - Quora
Black Hole Warps Space so Much That Astronomers See Light Behind It
How does gravity affect photons (that is, bend light) if photons have no mass? | Astronomy.com
Do laser tests prove the Earth is flat?
Refraction and light bending (article) | Khan Academy
NASA — How Gravity Warps Light
Neutron stars bend light so much we see their front and back at once | New Scientist
Tiny sphere bends light like a black hole does
Gravity telescope to image exoplanets | Stanford News
This weird black hole is bending light back on itself like a boomerang | Space
Light from behind a black hole spotted for 1st time, proving Einstein right | Live Science
Gravitational lens - Wikipedia
Lunar Eclipse 101
general relativity - How do we know that bending of light around stars is due to bending of space-time and not diffraction? - Physics Stack Exchange
