Tag Archives: Enceladus

Long Range Sensors Detect…

  • Possible aurora display this weekend
  • Citizen scientists are closing in on Planet Nine
  • Moon of Saturn has hydrogen and water

Possible aurora display this weekend: A magnetic filament on the sun exploded on April 9th, hurling a gaseous coronal mass ejection (CME) into space. The bulk of the CME will miss Earth; nevertheless a glancing blow to Earth’s magnetic field is possible this weekend. The impact, if it occurs, could cause magnetic disturbances and auroras around our planet’s poles. Visit today’s edition of Spaceweather.com to view a movie of the instigating explosion and for updates as the CME approaches.

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Citizen scientists are closing in on Planet Nine : The Australian team are working in tandem with the public to search for what could possibly be one of the biggest discoveries of the century: a new, very massive planet. In 2016, Caltech astronomer Mike Brown and theoretical astrophysicist Konstantin Batygin announced that they’d found evidence of a massive planet orbiting far off in the annex of the solar system with a predicted orbit of 20,000 years.  Its presence is inferred from the orbit of several Kuiper Belt Objects which have dramatic orbits.  READ MORE

Moon of Saturn has hydrogen and water:  In what is likely to be its final big discovery before it plunges into the gas giant planet Saturn later this year, the NASA spacecraft Cassini has discovered what could be a habitable ocean environment on Enceladus, one of Saturn’s dozens of moons.  The discovery, reported in the journal Science and announced by NASA Thursday, shows there is hydrogen in the massive plumes of gases and water that explode like geysers from Enceladus’s south pole, out of geological features known as “tiger stripes.”   READ MORE from Montreal Gazette And from  Astronomy Magazine:  Researchers published a paper last year suggesting that hydrothermal vents were the source of life on Earth, where chemical reactions fed these early microbes. If that’s the case on Enceladus, the ocean may have microbial life at the very least.  “The hydrogen could be a potential source of chemical energy for any microbes living in Enceladus’ ocean,” Spilker says.
Of course, it may be years or even decades until we know for sure — in September, NASA will intentionally crash Cassini into Saturn to make sure it doesn’t crash land into Titan or Enceladus and accidentally contaminate either potentially habitable moon with Earth bacteria.   Read More from Astronomy Magazine

Long Range Sensors Detect…

  • Atomic oxygen in martian atmosphere
  • SpaceX pulled off its hardest sea landing yet
  • New insights on Enceladus’ geysers
  • Resurgence of the Brightest Supernova

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Atomic oxygen in martian atmosphere: An instrument onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA) detected atomic oxygen in the atmosphere of Mars for the first time in 40 years. These atoms were found in the upper layers of the martian atmosphere known as the mesosphere. READ MORE

SpaceX pulled off its hardest sea landing yet:  SpaceX had its second successful at-sea return of a first stage rocket, bringing a Falcon 9 back down from orbit. But the feat was even harder than last month’s successful return: the rocket came down at 4,400 miles per hour.  READ MORE

New insights on Enceladus’ geysers: The Cassini spacecraft viewed a bright star passing behind a plume of gas and dust spewing from Saturn’s moon Enceladus. The Saturn-orbiting Cassini probe, using its Ultraviolet Imaging Spectrograph (UVIS), was able to measure the amount of water vapor erupting from Enceladus, offering new insights on geologic activity beneath the moon’s surface READ MORE

Resurgence of the Brightest Supernova: In 2015 ASASSN-15lh gained fame as the most luminous supernova ever discovered. Almost a year later and against all odds, the supernova has rebrightened.  READ MORE

 

 

Looking up!

Robot looks upNew findings from New Horizons shape understanding of Pluto and its moons

Among the highlights of a recent meeting are insights into Pluto’s geology and composition as well as new details about the unexpected haze in Pluto’s atmosphere and its interaction with the solar wind.  Read more, see fabulous montage of images on Astronomy Magazine’s website.

Cassini closes in on Enceladus one last time
NASA’s Saturn-orbiting Cassini spacecraft makes its final close flyby of the ocean-bearing moon Enceladus on December 19.

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enceladus_final
A thrilling chapter in the exploration of the solar system will soon conclude, as NASA’s Saturn-orbiting Cassini spacecraft makes its final close flyby of the ocean-bearing moon Enceladus. Cassini is scheduled to fly past Enceladus at a distance of 3,106 miles (4,999 kilometers) on Saturday, Dec. 19, at 9:49 a.m. PST (12:49 p.m. EST).

Although the spacecraft will continue to observe Enceladus during the remainder of its mission (through September 2017), it will be from much greater distances — at closest, more than four times farther away than the Dec. 19 encounter.

The upcoming flyby will focus on measuring how much heat is coming through the ice from the moon’s interior — an important consideration for understanding what is driving the plume of gas and icy particles that sprays continuously from an ocean below the surface.  Read more from the Astronomy website.