Press Esc to close
Tuesday 21 April 2015
News updated at 10:31 AM IST
Weather
Max: 33.4°C
Min : 21.6°C
In Bengaluru
Sunny day

New Neptune moon discovered

Washington, July 16, 2013, (IANS) :
Hubble space telescope / wikipedia image

The Hubble space telescope has found a new moon orbiting Neptune, the 14th known to be circling the blue-green planet, US space agency NASA said.

The moon, designated S/2004 N 1, is estimated to be no more than 19 km across, making it the smallest known moon in the Neptunian system, Xinhua cited NASA as saying in a statement.

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, and 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, the space agency said.

Mark Showalter of the US non-profit science research group SETI Institute 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," Showalter 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 in more than 150 archival Neptune photographs taken by Hubble from 2004 to 2009.

Showalter noticed the white dot about one million km from Neptune located between the orbits of the Neptunian moons Larissa and Proteus.

He plotted a circular orbit for the moon, which completes one revolution around Neptune every 23 hours, NASA said.


Go to Top

Photo Gallery
Minister U T Khader and MLA Vasanth Bangera stopping Minister B Ramanath Rai who got angry on ...

Minister U T Khader and MLA Vasanth Bangera stopping Minister B Ramanath Rai who got angry on ...

Yuvraj Singh of Delhi Daredevils plays a shot during their IPL match against Kolkata Knight Rider...

Yuvraj Singh of Delhi Daredevils plays a shot during their IPL match against Kolkata Knight Rider...

Police force at a large number being deployed for Left Front activists 'March to Lalbazar Kolkata...

Police force at a large number being deployed for Left Front activists 'March to Lalbazar Kolkata...

Kolkata Knight Riders players celebrate the wicket of J P Duminy (C) of Delhi Daredevils during ...

Kolkata Knight Riders players celebrate the wicket of J P Duminy (C) of Delhi Daredevils during ...

Traditional elephant fights, elephant races, tug of war and dances mark this festival which coincide

Traditional elephant fights, elephant races, tug of war and dances mark this festival which coincide

Villagers struggle to get drinking water from an almost dried well near Tansa dam, in Shahapur ...

Villagers struggle to get drinking water from an almost dried well near Tansa dam, in Shahapur ...

Prime Minister Narendra Modi at the foundation stone laying ceremony of Dr. Ambedkar International

Prime Minister Narendra Modi at the foundation stone laying ceremony of Dr. Ambedkar International

Narendra Modi talking with BJP veteran LK Advani during 'Garib Kalyan Yojana',...

Narendra Modi talking with BJP veteran LK Advani during 'Garib Kalyan Yojana',...

A view of the Kedarnath Shrine before it reopens on April 24 for general public...

A view of the Kedarnath Shrine before it reopens on April 24 for general public...

Snowed down surroundings of Kedarnath Shrine before it reopens on April 24 for general public...

Snowed down surroundings of Kedarnath Shrine before it reopens on April 24 for general public...

Copyright 2014, The Printers (Mysore) Private Ltd., 75, M.G Road, Post Box 5331, Bengaluru - 560001
Tel: +91 (80) 25880000 Fax No. +91 (80) 25880523