Toggle navigation
TWunroll
TWunroll
faq
Contact US
Dr. James O'Donoghue
physicsJ
At 99% the speed of light you could get to Mars in 30 seconds from *your* perspective, when Mars is (about) closest to EarthObservers on Earth however, would see you
Read more
Some flat earthers literally believe the Moon and/or planets/stars are a *projection* in the sky designed to trick us. Next time you engage with a flat earther who is vigorously
Read more
Why are Saturn's rings disappearing? An animated thread! We published our work Dec 17, 2018. Full press release / full video: https://www.nasa.gov/press-release/goddard/2018/ring-rain. BEGIN! Saturn's rings cover a surface area 80
Read more
Saturn's rings are a rainbow of ice scupted into position by gravity. Here's a natural colour 17 megapixel image taken by the Cassini spacecraft. Distances listed are from Saturn's center;
Read more
TOMORROW Jupiter and Saturn will be at their closest separation in the sky since 1623 at 0.1° apart. Here's an animation showing exactly how close that is relative to a
Read more
This is the only detailed image we have of Triton, by far Neptune's largest moon. It was captured in 1989 by the Voyager 2 spacecraft during its flyby of the
Read more
The relative rotation periods of planets in 2-D In the above are sidereal (relative to the stars) rotation periods, and axial tilts of the planets were surgically removed. This animation
Read more
By continuing to use the site, you are consenting to the use of cookies as explained in our
Cookie Policy
to improve your experience.
I agree