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Although Mercury orbits the Sun once every 88 Earth days, the three bodies align only about 13 times a century due to the planets’ relative orbital planes. One such ‘Mercury transit’ occurred on 11 November 2019. This short video highlights the rare event as recorded by NASA’s Solar Dynamics Observatory in a variety of ultraviolet light wavelengths. The resulting celestial spectacle demonstrates the vast size differences between the Sun and its nearest-orbiting planet to awesome effect. For NASA, however, the observation is more than just public outreach eye candy: scientists use these events to help understand the gravitational interactions of planets and stars in hopes of discovering planets outside our solar system.
Video by NASA’s Goddard Space Flight Center
Producer: Genna Duberstein
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Death
Even in modern secular societies, belief in an afterlife persists. Why?
9 minutes
video
Nature and landscape
Take a serene hike through an ancient forest, inspired by a Miyazaki masterpiece
6 minutes
video
Design and fashion
The mundane becomes mesmerising in this deep dive into segmented displays
14 minutes
video
Physics
A song of ice, fire and jelly – exploring the physics and history of the trumpet
9 minutes
video
Animals and humans
An artist and ants collaborate on an exhibit of ‘tiny Abstract Expressionist paintings’
5 minutes
video
Mathematics
How a curious question about colouring maps changed mathematics forever
9 minutes
video
Physics
A dreamy tribute to the music of Brian Eno, rendered in paint, soap and water
2 minutes
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Biology
To understand how an animal sees the world, start with the shape of its pupils
5 minutes
video
Technology and the self
Why we should worry less about ‘sentient’ AIs and more about what we’re teaching them
16 minutes