(3.6-m) Canada-France-Hawaii telescope at the Mauna Kea Observatory in Hawaii.Ĭhaldene: Discovered on November 23, 2000, by Scott S. ![]() (Image credit: NASA/JPL/DLR)Ĭarme: Discovered on July 30, 1938, by Seth Barnes Nicholson during observations made with the 100-inch (2.5 m) Hooker telescope at the Mount Wilson Observatory in California.Ĭarpo: Discovered on February 26, 2003, by a team of astronomers from the University of Hawaii's Institute for Astronomy led by Scott S. Image of Callisto taken from NASA's Galileo spacecraft. ![]() The discovery was made during a course of observations by the Spacewatch program of the University of Arizona.Ĭallisto : Discovered on January 7, 1610, by Italian scientist Galileo Galilei. Gleason, and Tom Gehrels from observations made with the 36-inch telescope on Kitt Peak. Kleyna at the Mauna Kea Observatory in Hawaii.Ĭallirrhoe: Discovered on October 19, 1999, by Jim V. Sheppard at the Mauna Kea Observatory in Hawaii.Īutonoe: Discovered on December 10, 2001, by Scott S. Hsieh during observations at the Mauna Kea Observatory in Hawaii.Īrche: Discovered on October 31, 2002, by Scott S. Kleyna during observations at the Mauna Kea Observatory, Hawaii.Īmalthea : Discovered on September 9, 1892, by American astronomer Edward Emerson Barnard.Īnanke: Discovered on September 28, 1951, by American astronomer Seth Barnes Nicholson from a photograph made using the 100-inch (2.5 meter) Hooker telescope at the Mount Wilson Observatory in California.Īoede: Discovered on February 8, 2003, by Scott S. Here is a list of 57 officially named moons of Jupiter along with details on their discovery, according to NASA.Īdrastea: Discovered in July 1979 by the Voyager science team.Īitne: Discovered on 9 December 2001 by Scott S. Stellar limb darkening, they say, would actually better explain observations of the parent star than darkening caused by the presence of a potential alien moon.Jupiter's official moons: Names and discovery dates The data do not suggest the existence of an exomoon around Kepler-1708b," Michael Hippke, research co-author and an astronomer at Sonneberg Observatory, said in the statement.įor Kepler-1625 b, Hippke and Heller suggest that an effect called "stellar limb darkening," which can cause variations in brightening across a star, impacted the proposed exomoon signal. "The probability of a moon orbiting Kepler-1708b is clearly lower than previously reported. Heller and colleagues arrived at the disappointing news regarding the exomoons of Kepler-1625 b and Kepler-1708 b using a computer algorithm they developed called "Pandora." Applying Pandora, designed to accelerate the discovery of exomoons, to data collected by NASA's Kepler Space Telescope of Kepler-1708 b revealed that scenarios lacking an exomoon were just as likely to explain observations of that exoplanet and its star alone. ![]() This is actually one of the reasons that evidence of the Kepler-1625 b exomoon appeared and then disappeared in Kepler Space Telescope data - only to reappear in later Hubble Space Telescope observations. Basically, that moon must be in a very specific position in relation to the planet so it can block some of its own starlight. The method should work on exomoons too, but because these satellites are much smaller than the worlds they orbit, a possible dip in light they cause would be farless significant.Īdditionally, an exomoon would need to be at a precise point in its orbit while scientists watch it transit, as its host planet transits the star too. "We would have liked to confirm the discovery of exomoons around Kepler-1625 b and Kepler-1708 b, but unfortunately, our analyses show otherwise." Pandora's box reveals grim 'planet only' predictionsĮxoplanets are often spotted orbiting their host stars when they cross in front of, or "transit" that star, causing a tiny dip in the star's light output. "Exomoons are so far away that we cannot see them directly, even with the most powerful modern telescopes," René Heller, team leader and a scientist at the Max Planck Institute for Solar System Research (MPS), said in a statement.
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