Space

July 15, 2013

NASA’s Hubble finds new Neptune moon

nasa-hubble
NASA’s Hubble Space Telescope has discovered a new moon orbiting the distant blue-green planet Neptune, the 14th known to be circling the giant planet.

The moon, designated S/2004 N 1, is estimated to be no more than 12 miles across, making it the smallest known moon in the Neptunian system. It is so small and dim that it is roughly 100 million times fainter than the faintest star that can be seen with the naked eye. It even escaped detection by NASA’s Voyager 2 spacecraft, which flew past Neptune in 1989 and surveyed the planet’s system of moons and rings.

Mark Showalter of the SETI Institute in Mountain View, Calif., found the moon July 1, while studying the faint arcs, or segments of rings, around Neptune. “The moons and arcs orbit very quickly, so we had to devise a way to follow their motion in order to bring out the details of the system,” he said. “It’s the same reason a sports photographer tracks a running athlete — the athlete stays in focus, but the background blurs.”

The method involved tracking the movement of a white dot that appears over and over again in more than 150 archival Neptune photographs taken by Hubble from 2004 to 2009.

On a whim, Showalter looked far beyond the ring segments and noticed the white dot about 65,400 miles from Neptune, located between the orbits of the Neptunian moons Larissa and Proteus. The dot is S/2004 N 1. Showalter plotted a circular orbit for the moon, which completes one revolution around Neptune every 23 hours.

The Hubble Space Telescope is a cooperative project between NASA and the European Space Agency. NASA’s Goddard Space Flight Center in Greenbelt, Md., manages the telescope. The Space Telescope Science Institute in Baltimore, Md., conducts Hubble science operations. STScI is operated by the Association of Universities for Research in Astronomy Inc., in Washington, D.C.

 




All of this week's top headlines to your email every Friday.


 
 

 

NASA seeks proposals to develop capabilities for deep space exploration, journey to Mars

NASA is soliciting proposals for concept studies or technology development projects that will be necessary to enable human pioneers to go to deep space destinations such as an asteroid and Mars. Through a Broad Area Announcemen NASA released Oct. 28, the agency seeks to use public-private partnerships to share funding to develop advanced propulsion, habitation...
 
 
Photograph courtesy of  NASA/CXC/Stanford/I. Zhuravleva et al

NASA’S Chandra Observatory identifies impact of cosmic chaos on star birth

Photograph courtesy of NASA/CXC/Stanford/I. Zhuravleva et al Chandra observations of the Perseus and Virgo galaxy clusters suggest turbulence may be preventing hot gas there from cooling, addressing a long-standing question of ...
 
 

NASA hosts first agency-wide social media event for Orion’s first flight test

NASA invites social media followers to apply for credentials to get a preview of the Orion spacecraft’s first flight test during NASA Social events Dec. 3 at each of its 10 centers. Orion will launch on a United Launch Alliance Delta IV Heavy rocket from Space Launch Complex 37 at Cape Canaveral Air Force Station,...
 

 
nasa-spacex

Critical NASA science returns to Earth aboard SpaceX Dragon spacecraft

SpaceX’s Dragon cargo spacecraft splashed down at 3:39 p.m., EDT, Oct. 25, in the Pacific Ocean, approximately 300 miles west of Baja California, returning 3,276 pounds of NASA cargo and science samples from the Internati...
 
 
NASA, ESA, PSI, JHU/APL, STScI/AURA image

Close encounters: Comet Siding Spring seen next to Mars

NASA, ESA, PSI, JHU/APL, STScI/AURA image This composite NASA Hubble Space Telescope Image captures the positions of comet Siding Spring and Mars in a never-before-seen close passage of a comet by the Red Planet, which happened...
 
 

NASA Astronaut Scott Kelly shares bullying prevention message ahead of one-year mission

NASA astronaut Scott Kelly, who is scheduled to fly on a one-year spaceflight mission in 2015, is lending his voice to help reduce childhood bullying. As part of Bullying Prevention Awareness Month, Kelly recorded a special message encouraging bystanders to take action. “Be more than just a bystander,” said Kelly in the message. “Take action...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>