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Thread: Astronomy

  1. #1336
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    1. I Agree
    2. You are probably right.
    3. Yes, but I don't think anyone is expecting to find a habitable planet, more interested in finding primitive forms of life (probably single cell).

  2. #1337
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    https://www.jpl.nasa.gov/news/news.php?feature=6942

    I didn't know that Jupiter's moon Europa, showed similar signs of activity similar to Enceladus.

    Checked it out and it is indeed true. See https://www.universetoday.com/134116...-ocean-worlds/. This was in the late 1990s.

    Onward to Europa

    "Jupiter's moon Europa has been a prime target for future exploration since NASA's Galileo mission, in the late 1990s, found strong evidence for a salty global ocean of liquid water beneath its icy crust. But the more recent revelation that a much smaller moon like Enceladus could also have not only liquid water, but also chemical energy that could potentially power biology, was staggering.

    "Many lessons learned during Cassini's mission are being applied to planning NASA's Europa Clipper mission, planned for launch in the 2020s. Europa Clipper will fly by the icy ocean moon dozens of times to investigate its potential habitability, using an orbital tour design derived from the way Cassini has explored Saturn. The Europa Clipper mission will orbit the giant planet -- Jupiter in this case -- using gravitational assists from its large moons to maneuver the spacecraft into repeated close encounters with Europa. This is similar to the way Cassini's tour designers used the gravity of Saturn's moon Titan to continually shape their spacecraft's course."

  3. #1338
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    https://solarsystem.nasa.gov/planets/whatisaplanet

    This website is interesting for its broad historical approach to space exploration, and how NASA has been operating. It has changed from just visiting planets and moons to longer and more detailed studies of these bodies.

    See also https://www.universetoday.com/129594...largest-moons/
    Last edited by Dreamwoven; 11-09-2017 at 06:37 AM.

  4. #1339
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    “Jupiter is the Rosetta Stone of our solar system,” says Bolton. “It is by far the oldest planet, contains more material than all the other planets, asteroids and comets combined and carries deep inside it the story of not only the solar system but of us. Juno is going there as our emissary — to interpret what Jupiter has to say.”

    https://www.universetoday.com/129594...largest-moons/

  5. #1340
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    Quote Originally Posted by Dreamwoven View Post
    I am going to try out starting a discussion of what we already know of Enceladus, the icy moon of Saturn, and one of the moons of Jupiter, Europa. I provide some links for discussion: NASA is planning to do a special study of these moon using a new probe, to see if this moon's oceans may contain life, because of the plumes of water breaking through Enceladus' icy surface. The Europa clipper probe is being planned for the 2020s. These links provide some of the background.

    https://www.jpl.nasa.gov/news/news.php?feature=6942
    https://www.nasa.gov/europa
    https://www.nasa.gov/topics/solarsystem/index.html
    Sorry, DW. I had an appointment this morning and am several links behind. I´ll try to catch up, but I have to do this slowly.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  6. #1341
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    So first:

    After Cassini: Pondering the Saturn Mission's Legacy

    "As the Cassini spacecraft nears the end of a long journey rich with scientific and technical accomplishments, it is already having a powerful influence on future exploration. In revealing that Saturn's moon Enceladus has many of the ingredients needed for life, the mission has inspired a pivot to the exploration of "ocean worlds" that has been sweeping planetary science over the past decade."

    I think this exploration of "ocean worlds" is related to the atmospheric and planet weather studies.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  7. #1342
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    Quote Originally Posted by Dreamwoven View Post
    https://www.jpl.nasa.gov/news/news.php?feature=6942

    I didn't know that Jupiter's moon Europa, showed similar signs of activity similar to Enceladus.

    Checked it out and it is indeed true. See https://www.universetoday.com/134116...-ocean-worlds/. This was in the late 1990s.

    Onward to Europa

    "Jupiter's moon Europa has been a prime target for future exploration since NASA's Galileo mission, in the late 1990s, found strong evidence for a salty global ocean of liquid water beneath its icy crust. But the more recent revelation that a much smaller moon like Enceladus could also have not only liquid water, but also chemical energy that could potentially power biology, was staggering.

    "Many lessons learned during Cassini's mission are being applied to planning NASA's Europa Clipper mission, planned for launch in the 2020s. Europa Clipper will fly by the icy ocean moon dozens of times to investigate its potential habitability, using an orbital tour design derived from the way Cassini has explored Saturn. The Europa Clipper mission will orbit the giant planet -- Jupiter in this case -- using gravitational assists from its large moons to maneuver the spacecraft into repeated close encounters with Europa. This is similar to the way Cassini's tour designers used the gravity of Saturn's moon Titan to continually shape their spacecraft's course."
    Europa Clipper is a significant name for a Spacecraft. What fascinates me here is the use of "moon energy" to maneuver the spacecraft.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  8. #1343
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    This post of mine was put back into draft mode, it happens often, so I always copy th post before refreshing the page.

    “Jupiter is the Rosetta Stone of our solar system,” says Bolton. “It is by far the oldest planet, contains more material than all the other planets, asteroids and comets combined and carries deep inside it the story of not only the solar system but of us. Juno is going there as our emissary — to interpret what Jupiter has to say.”

    https://www.universetoday.com/129594...largest-moons/

  9. #1344
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    We are going to have to reconsider how supernovae work. One has been spotted which shows the star still active. See https://astronomynow.com/2017/11/09/...would-not-die/

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    https://www.universetoday.com/137803...an-work-venus/ Venus and other extremely hot environments, like Mercury.

    The record is held by the Soviet Venera 13 lander that survived on the surface of Mercury transmitting data for 127 minutes. NASA are experimenting with more durable technology, with the aim of operating on Mercury or Venus much like lander explorers work on Mars.

  11. #1346
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    Quote Originally Posted by Dreamwoven View Post
    This post of mine was put back into draft mode, it happens often, so I always copy th post before refreshing the page.

    “Jupiter is the Rosetta Stone of our solar system,” says Bolton. “It is by far the oldest planet, contains more material than all the other planets, asteroids and comets combined and carries deep inside it the story of not only the solar system but of us. Juno is going there as our emissary — to interpret what Jupiter has to say.”

    https://www.universetoday.com/129594...largest-moons/
    Yes, I noticed that.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  12. #1347
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    Quote Originally Posted by Dreamwoven View Post
    We are going to have to reconsider how supernovae work. One has been spotted which shows the star still active. See https://astronomynow.com/2017/11/09/...would-not-die/
    "Astronomers discover a star that would not die
    Supernovae, the explosions of stars, have been observed in the thousands and in all cases they marked the death of a star. Astronomers at Las Cumbres Observatory have discovered a remarkable exception — a star that exploded multiple times over a period of more than fifty years. Their observations are challenging existing theories on these cosmic catastrophes."
    https://astronomynow.com/2017/11/09/...would-not-die/

    Wow! Like those birthday candles that repeatedly explode in fireworks. They will have to discover first if
    there are more of them.
    Last edited by Danik 2016; 11-10-2017 at 08:36 AM.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  13. #1348
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    Quote Originally Posted by Dreamwoven View Post
    https://www.universetoday.com/137803...an-work-venus/ Venus and other extremely hot environments, like Mercury.

    The record is held by the Soviet Venera 13 lander that survived on the surface of Mercury transmitting data for 127 minutes. NASA are experimenting with more durable technology, with the aim of operating on Mercury or Venus much like lander explorers work on Mars.
    Yes. Much more advanced technology is certainly indispensable for the exploration of Venus.
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  14. #1349
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    Attempted explanation on the phenomena of the star that survives explosions:

    Puzzling new supernova may be from star producing antimatter
    "An exploding star that continued to shine for nearly two years — unlike most supernovae, which fade after a few weeks — is puzzling astronomers and leading theorists, including UC Berkeley astrophysicist Daniel Kasen, to suggest that the event may be an example of a star so hot that it produces antimatter in its core."

    https://www.technology.org/2017/11/1...ng-antimatter/
    "I seemed to have sensed also from an early age that some of my experiences as a reader would change me more as a person than would many an event in the world where I sat and read. "
    Gerald Murnane, Tamarisk Row

  15. #1350
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    https://www.universetoday.com/137820...-near-surface/

    Life on Mars in the form of micro-organisms surviving beneath the surface: I've always thought that must be possible. Seems like much ado about nothing, even if almost nothing...

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