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Vector graphic/illustration showing Enceladus' young surfaces

8 Real World Science Facts About Saturn's Moon Enceladus

May 9, 2016 Transit of Mercury as imaged by NASA's Solar Dynamics Observatory

Can You Spot Mercury?

slideshow

The NASA Pi Day Challenge

Update: March 16, 2020 – The answers to the 2020 NASA Pi Day Challenge are here! View the illustrated answer key (also available as a text-only doc).

Can you use π (pi) to solve these stellar math problems faced by NASA scientists and engineers?

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› Educators, explore how to turn this into a lesson for students

NASA Pi Day Challenge

Illustration (split-screen) of Perseverance landing on Mars in a smaller landing ellipse compared with Curiosity's.

Illustration of Arrokoth orbiting the Sun with New Horizons flying by.

Illustration of an airplane flying over the ocean with coral shown below the water's surface. A spectral ray expands from the airplane down to the ocean floor

Illustration of two planets orbiting the star Beta Pictoris surrounded by a disk of debris. An inset illustration of the Spitzer space telescope shows a triangular beam representing the spacecraft's view of the disk

Illustration of Mars before the dust storm with the view from the rover showing full sun, then a view after the dust storm with the rover's view of the sun blacked out

Illustration of clouds floating over the land with a large cloud in the middle showing an outline of a cylinder and a measurement of 10 km. The terra satellite is flying above with arrays from its nine cameras pointing down at the land.

Illustration showing Jupiter and its great red spot in 1979 with the Voyager spacecraft flying by on one side. On the other side, Jupiter's great red spot is smaller and an inset shows the Hubble Space Telescope imaging the planet.

Illustration showing a laser pointed down at ice on one side. On the other side the ice has been exploded and an inset shows molecules, including amino acids.

Animation of Kepler-186f orbiting its star

Animation of helium rain inside Jupiter

Animation of NASA's InSight Mars lander sensing a marsquake

Animation of asteroid 'Oumuamua traveling past the Sun

Crater Curiosity - Craters on Mars - NASA Pi Day Challenge

Epic Eclipse - Craters on Mars - NASA Pi Day Challenge

Finale Fanfare - Craters on Mars - NASA Pi Day Challenge

Habitable Hunt - NASA Pi Day Challenge

Hazy Halo - Titan Pi in the Sky Pi Day Challenge

Round Recon - Mars Reconnaissance Orbiter Pi in the Sky Pi Day Challenge

Sun Screen - Transit of Mercury Pi in the Sky Pi Day Challenge

Gravity Grab - Juno Orbit Insertion at Jupiter Pi in the Sky Pi Day Challenge

Mars Marathon - Mars Exploration Rover Opportunity Pi in the Sky Pi Day Challenge

Pixel Puzzler - Dawn at Ceres Pi in the Sky Pi Day Challenge

Frozen Formula - Europa Pi in the Sky Pi Day Challenge

Hear Here - Voyager Deep Space Network Pi in the Sky Pi Day Challenge

Satellite Solver - SMAP Earth satellite Pi in the Sky Pi Day Challenge

Roving Riddle - Curiosity Mars Rover Pi in the Sky Pi Day Challenge

Jupiter Jockey - Juno at Jupiter Pi in the Sky Pi Day Challenge

Flying Formula - Cassini at Saturn Pi in the Sky Pi Day Challenge