Privileged Planet: comparing solar systems (Introduction)
by David Turell 
, Tuesday, February 02, 2016, 19:24 (3217 days ago) @ dhw
David's comment: Our Earth is very different and very special, and it looks like our solar system is quite unusual, which fits the pattern that life needs a very special place to develop. The Earth is two-thirds of the way out on the second spiral arm, a quiet place in the Milky Way without too much radiation or explosions. > > > dhw: Definitely different, definitely special. It makes you wonder why in heaven your God had to make all those billions of ordinary, same-old, non-special solar systems that don't seem to do anything for anyone. (Apparently they're all there for our sake, though only he knows why.) Or maybe...maybe...we just got lucky...-Like debating the design of the retina as 'unfortunately backwards', we find it is better that way. Perhaps we will discover why the universe is necessarily built like it is. You are a good second guesser.
Complete thread:
- Privileged Planet: Keppler searches for other Earths -
David Turell,
2011-02-05, 18:14
![[*]](themes/default/images/complete_thread.png "Open whole thread")
- Privileged Planet: Keppler searches for other Earths -
xeno6696,
2011-02-06, 01:34
- Privileged Planet: New book -
David Turell,
2011-12-31, 19:24
- Privileged Planet: New book -
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- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 05:40
- Privileged Planet: comparing solar systems -
dhw,
2016-02-02, 18:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 19:24
- Privileged Planet: comparing solar systems -
dhw,
2016-02-03, 13:04
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-03, 15:38
- Privileged Planet: comparing solar systems -
dhw,
2016-02-04, 08:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-04, 15:52
- Privileged Planet: comparing solar systems -
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2016-02-05, 18:58
- Privileged Planet: very early Earth -
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- Privileged Planet: very early Earth -
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- Privileged Planet: p;ate tectonics and 'snowball Earth' -
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2018-05-08, 01:08
- Privileged Planet: when land masses appeared -
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2018-05-25, 21:12
- Privileged Planet: when land masses appeared -
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2018-05-26, 11:31
- Privileged Planet: when land masses appeared -
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2018-05-26, 15:08
- Privileged Planet: where nitrogen is stored -
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2018-05-29, 20:53
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- Privileged Planet: where nitrogen is stored -
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2018-05-29, 20:53
- Privileged Planet: when land masses appeared -
David Turell,
2018-05-26, 15:08
- Privileged Planet: when land masses appeared -
dhw,
2018-05-26, 11:31
- Privileged Planet: plate tectonics explained -
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2018-06-08, 20:05
- Privileged Planet: plate tectonics explained -
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- Privileged Planet: our tilt helps life -
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2018-06-21, 14:50
- Privileged Planet: our tilt helps life -
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2018-07-03, 18:29
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2018-08-16, 14:35
- Privileged Planet: life transformed the Earth -
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2018-10-31, 18:25
- Privileged Planet: life transformed the Earth -
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- Privileged Planet: life transformed the Earth -
David Turell,
2018-11-02, 19:37
- Privileged Planet: why does Earth have so much water? -
David Turell,
2018-11-05, 20:00
- Privileged Planet: we have a safe sun -
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2018-11-06, 00:04
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- Privileged Planet: why does Earth have so much water? -
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2018-11-07, 19:43
- Privileged Planet: water and subduction -
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- Privileged Planet: life giving matter from a collision -
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- Privileged Planet: life giving matter from a collision !! - David Turell, 2019-01-23, 21:22
- Privileged Planet: life giving matter from a collision -
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2019-01-23, 20:11
- Privileged Planet: water and subduction -
David Turell,
2018-11-19, 22:00
- Privileged Planet: we have a safe sun -
David Turell,
2018-11-06, 00:04
- Privileged Planet: why does Earth have so much water? -
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2018-11-05, 20:00
- Privileged Planet: life transformed the Earth -
David Turell,
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2018-11-07, 17:56
- Privileged Planet: bacteria may cause ore deposits -
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2019-01-26, 19:16
- Privileged Planet: magnetic field history -
David Turell,
2019-01-31, 04:37
- Privileged Planet: magnetic field history II -
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2019-02-21, 21:36
- Privileged Planet: our atmosphere like none other -
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2019-02-24, 04:45
- Privileged Planet: when early oxygen appeared -
David Turell,
2019-02-25, 20:12
- Privileged Planet: strong magnetic field required -
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2019-03-15, 18:14
- Privileged Planet: tectonic plates required -
David Turell,
2019-04-03, 22:15
- Privileged Planet: iron core produces protective magnetism -
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2019-05-06, 20:53
- Privileged Planet: another comment on internal importance -
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2019-05-06, 22:59
- Privileged Planet: new oxygen and subduction relationship -
David Turell,
2019-05-10, 21:44
- Privileged Planet: availability of nutrients for life -
David Turell,
2019-05-22, 18:19
- Privileged Planet: new study of Earth's core - David Turell, 2019-07-15, 05:23
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David Turell,
2019-05-22, 18:19
- Privileged Planet: new oxygen and subduction relationship -
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- Privileged Planet: another comment on internal importance -
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- Privileged Planet: tectonic plates started 2.5 b years a ago -
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2019-08-09, 00:33
- Privileged Planet: measuring Earth's early crust -
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2019-09-24, 19:21
- Privileged Planet: very early magnetic field - David Turell, 2020-01-25, 15:59
- Privileged Planet: measuring Earth's early crust -
David Turell,
2019-09-24, 19:21
- Privileged Planet: iron core produces protective magnetism -
David Turell,
2019-05-06, 20:53
- Privileged Planet: tectonic plates required -
David Turell,
2019-04-03, 22:15
- Privileged Planet: strong magnetic field required -
David Turell,
2019-03-15, 18:14
- Privileged Planet: when early oxygen appeared -
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2019-02-25, 20:12
- Privileged Planet: our atmosphere like none other -
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2019-02-24, 04:45
- Privileged Planet: magnetic field reversals -
David Turell,
2021-02-18, 21:09
- Privileged Planet: continental subduction allows life -
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2021-02-24, 23:10
- Privileged Planet: continental subduction allows life -
David Turell,
2021-03-02, 20:07
- Privileged Planet: early Earth mostly molten -
David Turell,
2021-03-12, 22:27
- Privileged Planet: deep ocean plate tectonics -
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2021-03-18, 19:42
- Privileged Planet: short early days and oxygen levels - David Turell, 2021-08-03, 15:22
- Privileged Planet: deep ocean plate tectonics -
David Turell,
2022-08-19, 16:23
- Privileged Planet: continent formation -
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2022-08-20, 18:06
- Privileged Planet: giant impact 3.2 bya - David Turell, 2024-10-23, 17:59
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David Turell,
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- Privileged Planet: deep ocean plate tectonics -
David Turell,
2021-03-18, 19:42
- Privileged Planet: early Earth mostly molten -
David Turell,
2021-03-12, 22:27
- Privileged Planet: continental subduction allows life -
David Turell,
2021-03-02, 20:07
- Privileged Planet: magnetic loss and return -
David Turell,
2022-09-21, 16:38
- Privileged Planet: meteorite's contribution -
David Turell,
2022-09-30, 20:51
- Privileged Planet: meteorite's contribution of nitrogen -
David Turell,
2023-12-03, 17:47
- Privileged Planet: early magnetic field -
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2024-04-25, 23:04
- Privileged Planet: more on early zircons -
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2024-05-03, 18:05
- Privileged Planet: more on early zircons - David Turell, 2024-07-12, 19:12
- Privileged Planet: early magnetic field II -
David Turell,
2024-05-10, 17:41
- Privileged Planet: water in nanopores -
David Turell,
2024-07-25, 21:48
- Privileged Planet: unmelted asteroids needed - David Turell, 2024-10-26, 16:34
- Privileged Planet: water in nanopores -
David Turell,
2024-07-25, 21:48
- Privileged Planet: more on early zircons -
David Turell,
2024-05-03, 18:05
- Privileged Planet: early magnetic field -
David Turell,
2024-04-25, 23:04
- Privileged Planet: meteorite's contribution of nitrogen -
David Turell,
2023-12-03, 17:47
- Privileged Planet: meteorite's contribution -
David Turell,
2022-09-30, 20:51
- Privileged Planet: continental subduction allows life -
David Turell,
2021-02-24, 23:10
- Privileged Planet: magnetic field history II -
David Turell,
2019-02-21, 21:36
- Privileged Planet: magnetic field history -
David Turell,
2019-01-31, 04:37
- Privileged Planet: bacteria may cause ore deposits -
David Turell,
2019-01-26, 19:16
- Privileged Planet: life transformed the Earth -
Balance_Maintained,
2018-11-02, 15:24
- Privileged Planet: life transformed the Earth -
David Turell,
2018-10-31, 18:25
- Privileged Planet: our tilt helps life - David Turell, 2019-07-29, 19:43
- Privileged Planet: clouds an interlocked system -
David Turell,
2018-08-16, 14:35
- Privileged Planet: our tilt helps life -
David Turell,
2018-07-03, 18:29
- Privileged Planet: our tilt helps life -
David Turell,
2018-06-21, 14:50
- Privileged Planet: plate tectonics explained -
dhw,
2018-06-09, 11:05
- Privileged Planet: when land masses appeared -
David Turell,
2018-05-25, 21:12
- Privileged Planet: p;ate tectonics and 'snowball Earth' -
David Turell,
2018-05-08, 01:08
- Privileged Planet: we have useful phosphorus -
David Turell,
2018-04-06, 14:56
- Privileged Planet: very early Earth -
David Turell,
2018-03-29, 18:07
- Privileged Planet: very early Earth -
David Turell,
2017-05-08, 18:50
- Privileged Planet: comparing solar systems -
dhw,
2016-02-05, 18:58
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-04, 15:52
- Privileged Planet: comparing solar systems -
dhw,
2016-02-04, 08:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-03, 15:38
- Privileged Planet: comparing solar systems -
dhw,
2016-02-03, 13:04
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 19:24
- Privileged Planet: comparing solar systems -
dhw,
2016-02-02, 18:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 05:40
- Privileged Planet: New study -
David Turell,
2015-07-22, 16:36
- Privileged Planet: Magnetic field -
David Turell,
2015-04-15, 18:38
- Privileged Planet: New book -
David Turell,
2015-03-05, 05:23
- Privileged Planet: New book -
David Turell,
2011-12-31, 19:24
- Privileged Planet: Keppler searches for other Earths -
xeno6696,
2011-02-06, 01:34