Category Archives: Juno

Almost Home for Juno


This view of Jupiter was taken from the Juno spacecraft on 21 June 2016 as it approaches the giant planet. The distinctive banding of the planet is becoming evident and we can easily see the four major moons and they are, in order from left to right: Ganymede, Callisto, Io and Europa. You can see these moons from Earth with just a pair of binoculars too, give it a try.

Juno is approaching Jupiter over the north pole so we are going to get a very different perspective than we got from other missions.

If you are thinking the image is a little blurry no to worry; Junocam is designed to take high resolution images of the Jovian atmosphere and not distance shots. This image was taken from 10.9 million km / 6.8 million miles.

One week to go!

Image: NASA/JPL-Caltech/MSSS

The Juno Team


With a month to go before the Juno spacecraft reaches Jupiter and conducts a great mission now is a good time to meet the people flying the spacecraft.

From left to right:
Kenny Starnes – MSA Manager,
Kirsten Francis – Guidance, Navigation and Control Engineer,
Alexandra Hilbert – Systems and Guidance, Navigation and Control Engineer,
Bryce Strauss – Mission Operations Systems Engineer, and
Wil Santiago – Mission Operations Thermal Engineer.

Read about what they do from Lockheed Martin (it’s quick).

Juno art courtesy of NASA/JPL-Caltech

Juno Mission to Jupiter

A detailed look at the Juno mission to Jupiter. We are just about a month away from arrival! This lecture was recorded at the Von Karman Auditorium, NASA-JPL, Pasadena, California on Nov. 5, 2015.


Where’s Juno?



In case you were wondering where Juno is on the trip to Jupiter, wonder no more.

81 days to go!

From NASA (25 March 2016):

As of March 25, 2016, Juno is approximately 410 million miles (659 million kilometers) from Earth. The one-way radio signal travel time between Earth and Juno is currently about 37 minutes.

Juno is traveling at a velocity of approximately 53,000 miles per hour (about 23.6 kilometers per second) relative to Earth, 16,000 miles per hour (about 7.1 kilometers per second) relative to the Sun, and 13,000 miles per hour (about 5.7 kilometers per second) relative to Jupiter. Juno has now travelled 1.73 billion miles (2.78 billion kilometers, or 18.56 AU) since launch, and has another 34 million miles to go (55 million kilometers, or 0.37 AU) before entering orbit around Jupiter.

The Juno spacecraft is in excellent health and is operating nominally.

Juno is slated to arrive at the gas giant planet on July 4, 2016, at 8:35 p.m. PDT (Earth Received Time). Track and visualize Juno’s journey through space using NASA’s Eyes on the Solar System 3D interactive.

Juno’s onboard color camera, called JunoCam, invites the public to serve as a virtual imaging team. Vote and comment on where to point JunoCam and which features to image on Jupiter using the new JunoCam web platform at

 Image: NASA

Jupiter Here We Come


We’ve been patiently waiting for the Juno spacecraft to arrive at Jupiter and finally: Here we go!

Click NASA’s infographic above for a larger (more readable version),

Credits: NASA/JPL-Caltech

From NASA:
NASA’s solar-powered Juno spacecraft successfully executed a maneuver to adjust its flight path today, Feb. 3. The maneuver refined the spacecraft’s trajectory, helping set the stage for Juno’s arrival at the solar system’s largest planetary inhabitant five months and a day from now.

“This is the first of two trajectory adjustments that fine tune Juno’s orbit around the sun, perfecting our rendezvous with Jupiter on July 4th at 8:18 p.m. PDT [11:18 p.m. EDT],” said Scott Bolton, Juno principal investigator at the Southwest Research Institute in San Antonio.

The maneuver began at 10:38 a.m. PST (1:38 p.m. EST). The Juno spacecraft’s thrusters fired for 35 minutes, consumed about 1.2 pounds (.56 kilograms) of fuel, and changed the spacecraft’s speed by 1 foot (0.31 meters), per second. At the time of the maneuver, Juno was about 51 million miles (82 million kilometers) from Jupiter and approximately 425 million miles (684 million kilometers) from Earth. The next trajectory correction maneuver is scheduled for May 31.

Juno was launched on Aug. 5, 2011. The spacecraft will orbit the Jovian world 33 times, skimming to within 3,100 miles (5,000 kilometers) above the planet’s cloud tops every 14 days. During the flybys, Juno will probe beneath the obscuring cloud cover of Jupiter and study its aurorae to learn more about the planet’s origins, structure, atmosphere and magnetosphere.

Juno’s name comes from Greek and Roman mythology. The god Jupiter drew a veil of clouds around himself to hide his mischief, and his wife — the goddess Juno — was able to peer through the clouds and reveal Jupiter’s true nature.

NASA’s Jet Propulsion Laboratory, Pasadena, California, manages the Juno mission for the principal investigator, Scott Bolton, of Southwest Research Institute in San Antonio. Juno is part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Space Flight Center in Huntsville, Alabama, for NASA’s Science Mission Directorate. Lockheed Martin Space Systems, Denver, built the spacecraft. The California Institute of Technology in Pasadena manages JPL for NASA.

Juno Mission

Juno spacecraft will reach Jupiter in July 2016 a few days ago NASA.  A public discussion was held at the Von Karman Auditorium, NASA-JPL, Pasadena, California on 05 Nov 2015.