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NASA Solar System Profile picture
@NASASolarSystem
Jun 7, 2021 • 5 tweets • 3 min read • Read on X
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At this very moment, our #JunoMission is approaching Jupiter’s giant moon Ganymede. Learn more about this historic flyby: missionjuno.swri.edu/news/nasas-jun…

Track Juno’s position in real time with our 3D solar system simulation: go.nasa.gov/3x1a5kU screen shot of app simulati...
The Juno spacecraft continues its approach on the night side of Ganymede.

Current distance to Ganymede: about 16,000 miles (26,000 kilometers).

Speed relative to Ganymede: about 41,000 MPH (66,000 kilometers per hour). screenshot of app showing s...
Closing in! Current distance: 6,000 miles (9,600 kilometers). Current speed: 41,300 MPH (66,500 kilometers per hour). screenshot showing simulate...
Closest approach! Distance: about 645 miles (1,000 kilometers). Speed: about 41,500 MPH (66,800 kilometers per hour).

It's our first close Ganymede flyby in 20 years! Stay tuned for images & science results. Meanwhile, learn more about the #JunoMission: missionjuno.swri.edu screenshot now showing very...
Departing Ganymede. Next up: a super-close pass over the cloud tops of Jupiter – the 34th of Juno's mission to the giant planet – will take place on June 8. Image

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More from @NASASolarSystem

NASA Solar System Profile picture
Dec 2
BREAKING: Sugars essential for life have been found in pristine asteroid Bennu samples collected by NASA’s OSIRIS-REx spacecraft. Combined with previous detections of amino acids and nucleobases, we see that life’s ingredients were widespread throughout the solar system: go.nasa.gov/48MTu9i

More on the study led by Yoshihiro Furukawa of @TohokuUniPR⤵️
Scientists identified ribose (used in RNA) and – for the first time in any extraterrestrial sample – glucose, a major energy source for life. These sugars join nucleobases and phosphates previously found, demonstrating the full suite of RNA building blocks were present on the ancient asteroid.This image shows a circular metal container divided into six wedge-shaped sections, each filled with varying amounts of dark, fine-grained material and small rocks. The surface is highly organized, with scientific tools and utensils placed neatly to the left and right sides. This container holds samples collected from asteroid Bennu by NASA’s OSIRIS-REx mission, prepared for analysis in a sterile laboratory environment.
While ribose was present, deoxyribose (the DNA sugar) was not. This suggests RNA may have been more prevalent than DNA in the early solar system – supporting the “RNA world” hypothesis that DNA was not necessary for the origin of life. Silver wedge-shaped container has a ruler on the sides in centimeters. Small dark rocks and rubble are within the container, which says OREX A4.
Read 5 tweets
NASA Solar System Profile picture
Dec 12, 2024
On approach! Right now, the #LucyMission spacecraft is about 264 thousand miles (about 425 thousand kilometers) from Earth and closing as it nears its gravity assist flyby. Closest approach will occur at 11:15 p.m. EST (04:15 GMT on Dec. 13). Follow along: eyes.nasa.gov/apps/solar-sys…simulated view of the Lucy spacecraft, with its two large circular solar array panels, with the small blue marble of Earth in the distance amid the darkness of space
The maneuver will put Lucy on a course that will carry it through the main asteroid belt, where it will fly past the unexplored asteroid Donaldjohanson, then onto a Trojan asteroid swarm: go.nasa.gov/4iy7zdV
Getting close now! During the gravity assist, the Lucy spacecraft will approach from the direction of the Sun, which means observers on Earth will not be able to see Lucy approaching, as it will be lost in the Sun’s glare. But observers in certain locations may be able to spot it just before or just after closest approach: lucy.swri.edu/SpotTheSpacecr…Image
Read 6 tweets
NASA Solar System Profile picture
Jun 8, 2024
Happy #WorldOceansDay! Or should we say, World(s) Ocean Day? Did you know Earth isn't the only place in our solar system with an ocean of water? Here's a quick tour of just some of the other ocean worlds 🌊 🧵


Beneath a curving horizon, blue ocean, turquoise shallows near shorelines, and fluffy clouds on Earth, as seen from space.
Saturn's moon Titan seen in a crescent phase, with most of its surface in shadow. In the lit crescent area, the moon has orange clouds and layers of its atmosphere are visible in purple.
A black-and-white image of the curving horizon of a moon against the blackness of space. The moon's surface has a rough, wrinkled texture. From cracks in the surface, plumes of mist can be seeing rising, backlit by sunlight.
The smooth, cracked, curving surface of Jupiter's moon Europa.
Evidence suggests that deep below its surface, Saturn's planet-sized moon Titan hides a global ocean of water. NASA's Dragonfly mission, now in development, will send a rotorcraft to fly through Titan's atmosphere. science.nasa.gov/saturn/moons/t…
Saturn's moon Titan seen in a crescent phase, with most of its surface in shadow. In the lit crescent area, the moon has orange clouds and layers of its atmosphere are visible in purple.
Another Saturnian moon, Enceladus, has a global ocean of water beneath its crust as well. NASA's Cassini mission made the surprising discovery that water from that ocean shoots out into space from fissures in the surface, making giant plumes of ice particles. science.nasa.gov/saturn/moons/e…A black-and-white image of a curving horizon of a moon against the blackness of space. The moon's surface is rough. From cracks in the surface, plumes of mist can be seeing rising, backlit by sunlight
Read 5 tweets
NASA Solar System Profile picture
Sep 29, 2022
In clear skies, the planet Jupiter will be visible as a brilliant "star" in the east after sunset. With binoculars, the planet's largest moons can be seen as points of light nearby. One of those points is Europa. Within hours, our #JunoMission will be there.🧵 1/6 Jupiter is visible as a bright "star" in a partial
That little dot is actually a complex, intriguing world. Europa is about size of Earth's Moon. Beneath its cold outer shell of ice, scientists think it hides a global ocean of liquid water. The evidence came from several NASA spacecraft that flew by Jupiter over the years... 2/6 cross-crossing cracks on the surface of Europa as seen by VoEuropa appears as a tiny ball floating before the face of JuEuropa rises over the horizon of Jupiter in a New Horizons v
...and one in particular, the Galileo mission, which orbited the planet and observed Europa and its magnetic field up close. solarsystem.nasa.gov/galileo 3/6 Europa with its relatively smooth but cracked surface of strclose-up on some of the grooves, chaotic terrain, and depreseven closer look at multiple linear ridges and grooves, some
Read 7 tweets
NASA Solar System Profile picture
Sep 27, 2022
Did you catch bright Jupiter in the eastern sky tonight? If not, don't worry, it will be brilliant for days to come. go.nasa.gov/3QVyxNv
To the naked eye, Jupiter will appear as a very bright "star." Here's what it looked like earlier this week as seen through a skylight in a lava tube at Craters of the Moon National Monument. Jupiter appears as a bright...
With a small telescope, or even binoculars, Jupiter's largest moons are also visible. Learn more about the giant planet at solarsystem.nasa.gov/jupiter Jupiter is seen as a bright...
Read 4 tweets
NASA Solar System Profile picture
Feb 2, 2022
It's 2/2/22! For this day of 2️⃣s, here are some iconic pairs in our solar system. Some asteroids come in twos, such as Ida & Dactyl, as seen by the Galileo spacecraft. This year, our #DARTMission will perform its test at another pair, Didymos & Dimorphos: go.nasa.gov/3ofmhes an asteroid and its tiny moonlet against the blackness of sp
Two small moons of Saturn, Janus & Epimetheus, share very similar orbits around the planet, and they regularly swap positions. This series of images was captured by Cassini. go.nasa.gov/3giKM6T
Pluto and its largest moon Charon, seen here by the #NewHorizonsMission, are sometimes described as a double planet, since they orbit around the common center of gravity between them. go.nasa.gov/3giWoH0 smaller Charon and larger Pluto in space
Read 7 tweets

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