Header Bar Graphic
Space Image and IconSpace HeaderKids Image
Spacer Space IconHomepage ButtonWhat is NASA Quest ButtonSpacerCalendar of Events ButtonWhat is an Event ButtonHow do I Participate ButtonSpacerBios and Journals ButtonSpacerPics, Flicks and Facts ButtonArchived Events ButtonQ and A ButtonNews ButtonSpacerEducators and Parents ButtonSpacer
Highlight Graphic
Sitemap ButtonSearch ButtonContact Button

Finding Jupiter's Moons

image of  the orbit of Jupiter's moons at 12 hours

moons orbit4 hours Jupiter has 4 large moons which can be seen witha binoculars (and even with the naked eye if the night is just right).
The KAO observes Jupiter and its moons during the daytime on October 12, 1995. The astronomer operating telescope will be able to see Jupiter through the telescope, but maybe not the moons. The IR detector, however, wll 'see' the moons in infrared where they are brighter than the surrounding sky.

The order of moons outward from Jupiter is Io, Europa, Ganymede, and Callisto.

These moons are in constant orbital motion around Jupiter --each moving at its own speed based upon its distance from Jupiter. (i) and (ii) show the locations of the moons before -and after the KAO flight.
orbits at 20 hours The KAO begins observing Jupiter's moons -around 16:00 hrs--4 p.m. EDT on October 12, 1995. On figure (iii), draw where the moons will be at 16:00. EDT (20 hr. UT) just before the observing run begins. (HINT)-. This time is halfway between where the moons were at 12 hr. UT on Oct 12 and where they will be at 4 hr. UT Oct 13)

  • Which moons will be to the West of jupiter?

  • Which moons will be to the East of jupiter? *

  • What happens to lo at midnight on Oct. 12th, as seen from Earth?

*Please note how KAO's detector changes the normal placement of East and West. This is routine for astronomers.



Footer Bar Graphic
SpacerSpace IconAerospace IconAstrobiology IconWomen of NASA IconSpacer
Footer Info