Saturn’s gravity `stresses` icy moon’s erupting jets
Washington: The strong pull of Saturn’s gravity stretches and strains massive fissures on one of the planet’s icy moons that spray icy, geyser-like jets, a new has revealed.
New images from NASA’s Cassini spacecraft, in orbit around Saturn, reveal clues that have enabled scientists, for the first time, to make a connection between Saturn’s gravity and the jet-spewing fissures on the planet’s sixth largest moon, Enceladus.
“This new work gives scientists insight into the mechanics of these picturesque jets at Enceladus and shows that Saturn really stresses Enceladus,” Terry Hurford, a Cassini scientist at NASA’s Goddard Space Flight Center in Greenbelt, Md., said in a statement.
Astronomers have long been intrigued by the huge fissures on the Enceladus’ ice-covered surface that eject plumes of water vapour and icy particles.
The long fissures in the moon’s south polar region are nicknamed the “tiger stripes.”
In the new study, the researchers examined jets from the warmest regions of two tiger stripes, called Baghdad Sulcus and Damascus Sulcus.
The scientists had previously suggested that tidal pulls from Saturn’s gravity could explain the jets, but until now, they had been unable to make clear lines of connection between specific jets and calculated stress on the fissures.
The researchers found that the tiger stripes are strained the most when Enceladus swings closest to Saturn in its orbit.
The ringed planet’s gravitational pull could also stretch and deform the fissures, they added, which controls the timing of the spewing jets In fact, the researchers found that this type of deformation seemed to occur often as Enceladus’ circled Saturn, even when the moon was very far away.
These results suggest that Enceladus would need to have a large body of liquid water — a global or local ocean — for it to contract and stretch enough to deform the surface, Hurford said.
The findings also suggest that Saturn’s tidal movements generate a great deal of heat in the area.
“Cassini’s seven-plus years roaming the Saturn system have shown us how beautifully dynamic and unexpected the Saturn system is over time,” Linda Spilker, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, Calif., said in a statement.
“We’re looking forward to new discoveries as the seasons turn,” Spilker added.
More from India
More from World
More from Sports
More from Entertaiment
- PM Narendra Modi's speech at Heart of Asia conference
- Aware of Chinese submarine deployment at Balochistan's Gwadar port, says Navy chief
- Like SAARC, should India boycott Pak in Heart of Asia conference?
- 'Heart of Asia' Conference begins in Amritsar; Sartaj Aziz to pay a visit on Sunday
- Iraqi army inches close to Baghdadi in Mosul- Report
- Rs 14,000 crore default case: Gujarat businessman detained, says money belongs to politicians, babus
- LIVE: Jayalalithaa's condition critical after suffering cardiac arrest, huge crowd gathers outside Apollo hospital
- Newly-wed couple Yuvraj Singh and Hazel Keech perform `bhangra` at Goa airport – Viral video
- Gujarat man who disclosed Rs 14,000 crore unaccounted wealth goes missing
- RBI to issue new Rs 20, Rs 50 notes; old notes to remain legal tender