Jupiter's Moon Count Reaches 79, Including Tiny 'Oddball' - NBC Bay Area
National & International News
The day’s top national and international news

Jupiter's Moon Count Reaches 79, Including Tiny 'Oddball'

A dozen new moons are circling the giant gas planet than have been previously known

    processing...

    NEWSLETTERS

    What You Didn't Know About Daylight Saving Time
    AP

    Astronomers are still finding moons at Jupiter, 400 years after Galileo used his spyglass to spot the first ones.

    The latest discovery of a dozen small moons brings the total to 79, the most of any planet in our solar system.

    Scientists were looking for objects on the fringes of the solar system last year when they pointed their telescopes close to Jupiter's backyard, according to Scott Sheppard of the Carnegie Institute for Science in Washington. They saw a new group of objects moving around the giant gas planet but didn't know whether they were moons or asteroids passing near Jupiter.

    "There was no eureka moment," said Sheppard, who led the team of astronomers. "It took a year to figure out what these objects were."

    Toddler, Towed With Car, Left in Freezing Lot Overnight

    [NATL] Toddler, Towed With Car, Left in Freezing Lot Overnight

    A 4-year-old girl was left alone inside a minivan overnight in a Milwaukee, Wisconsin tow lot, authorities said. An impaired driver was pulled over and arrested for Operating While Intoxicated. Officers removed a 10-month-old child from the vehicle, but left the 4-year-old girl, who spent the night in the tow lot where temperatures dropped to 19 degrees.

    (Published 7 minutes ago)

    They all turned out to be moons of Jupiter. The confirmation of 10 was announced Tuesday. Two were confirmed earlier.

    The moons had not been spotted before because they are tiny. They are about one to two kilometers (miles) across, said astronomer Gareth Williams of the International Astronomical Union's Minor Planet Center.

    And he thinks Jupiter might have even more moons just as small waiting to be found.

    "We just haven't observed them enough," said Williams, who helped confirm the moons' orbits.

    The team is calling one of the new moons an 'oddball' because of its unusual orbit. Sheppard's girlfriend came up with a name for it: Valetudo, the great-granddaughter of the Roman god Jupiter.

    Valetudo is in Jupiter's distant, outer swarm of moons that circles in the opposite direction of the planet's rotation. Yet it's orbiting in the same direction as the planet, against the swarm's traffic.

    Professor Sues Over Transgender Pronoun Rebuke

    [NATL] Professor Sues Over Transgender Pronoun Rebuke

    A Shawnee State University professor is suing officials after receiving a written warning for violating its nondiscrimination policy by not addressing a transgender student using the gender terms preferred by the student. Nicholas Meriwether, a philosophy professor and evangelical Christian, filed a federal lawsuit this month against officials at the university in Portsmouth. 

    (Published 7 minutes ago)

    "This moon is going down the highway the wrong way," Sheppard said.

    Scientists believe moons like Valetudo and its siblings appeared soon after Jupiter formed. The planet must have acted like a vacuum, sucking up all the material that was around it. Some of that debris was captured as moons.

    "What astonishes me about these moons is that they're the remnants of what the planet formed from," he said.

    Telescopes in Chile, Hawaii and Arizona were used for the latest discovery and confirmation.

    Galileo detected Jupiter's four largest moons, Io, Europa, Ganymede and Callisto in 1610. The latest count of 79 known planets includes eight that have not been seen for several years. Saturn is next with 61, followed by Uranus with 27 and Neptune with 14. Mars has two, Earth has one and Mercury and Venus have none.

    ___

    The Associated Press Health & Science Department receives support from the Howard Hughes Medical Institute's Department of Science Education. The AP is solely responsible for all content.