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Unmanned Spaceflight.com > All posts by a member| Posted on: Aug 5 2021, 05:34 PM | |
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Member  Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741 
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New Horizons mission built and managed by APL revealed up close a new class of planets out in the outer solar system and a glimpse into what could be out there. Pluto turned out to be more interesting than ever imagined. Alan Stern and his team did a great job to humanity in persevering with the mission. His interest with suborbital science and commercial spaceflight should perhaps allow him to push for a Pluto orbiter, kuiper belt mission by private enterprise?!It would be a first. |
| Forum: New Horizons · Post Preview: #253900 · Replies: 2 · Views: 26017 |
| Posted on: Jun 20 2021, 12:37 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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It's a pity that Percy seems to be unable to traverse Seitah to examine layered rock from up close particularly where it seems to be overlain by volcanic deposits. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #253193 · Replies: 701 · Views: 253930 |
| Posted on: Jun 13 2021, 06:55 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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As Curiosity is heading towards the sulphate unit I have one question in my mind..the sulphate unit encountered by Opportunity in Meridiani was called Burns Formation. Would this formation include the whole sulphate unit in Gale? |
| Forum: MSL · Post Preview: #253041 · Replies: 990 · Views: 555580 |
| Posted on: Jun 11 2021, 09:50 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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To me the southern route that would have the rover pass by Kodiak on its way to the Delta looks more scientifically compelling. Any reason given for a change in direction heading North? |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #252995 · Replies: 701 · Views: 253930 |
| Posted on: Jun 11 2021, 06:53 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Close up views of the surface showing the ridges remind of a similar process happening on Europa. |
| Forum: Juno · Post Preview: #252990 · Replies: 195 · Views: 117582 |
| Posted on: Jun 8 2021, 06:16 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Ganymede is a planet in its own right. An iron core and silicate mantle topped by an icy crust which is partly fluid. An.internal heat source which generates a magnetic field. The surface exhibits tectonic activity possibly still ongoing. I wonder the source of its watery/ oxygen atmosphere whether is solely due to a collisional source and not a result of this tectonic acitivity?! |
| Forum: Juno · Post Preview: #252832 · Replies: 195 · Views: 117582 |
| Posted on: May 2 2021, 04:08 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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There is a topographically lower lying unit between the current rover position and delta. I know it may be premature to comment but Is this unit thought to represent lake bed deposits or still representative of a volcanic unit? |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #252012 · Replies: 275 · Views: 157537 |
| Posted on: Apr 29 2021, 09:25 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Interesting rocks on the crater floor..any ideas as to the greyish greenish color on some of the white rocks? |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #251961 · Replies: 275 · Views: 157537 |
| Posted on: Mar 8 2021, 03:00 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Has it been decided where to send the rover on a north or south route? |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #250709 · Replies: 309 · Views: 147491 |
| Posted on: Mar 7 2021, 07:40 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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QUOTE (xflare @ Mar 7 2021, 07:32 PM)  There are a few bands of darker material in the layers. Mars' KT boundary?? |
| Forum: MSL · Post Preview: #250697 · Replies: 990 · Views: 555580 |
| Posted on: Mar 7 2021, 07:26 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Dont know if its the correct site to post this but looking at the orbital view, the rock pavement next to where the rover is sitting right now looks morelike sedimentary to me rather than a lava field and yet i am no geologist so who knows. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #250696 · Replies: 424 · Views: 308683 |
| Posted on: Mar 6 2021, 06:29 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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So is Mont Mercou supposed to be made up of sulphate rock and hence this location would represent the contact with the clay unit? |
| Forum: MSL · Post Preview: #250634 · Replies: 990 · Views: 555580 |
| Posted on: Feb 20 2021, 12:25 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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The adjacent olivine unit looks to be at a lower level than the spot where Percy landed. Does that mean its older terrain? |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #249910 · Replies: 477 · Views: 263307 |
| Posted on: Feb 19 2021, 11:46 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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interesting to note the varying colour of surface rocks from white to grey. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #249906 · Replies: 477 · Views: 263307 |
| Posted on: Feb 18 2021, 09:24 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Congrats to the Mars 2020 team on a successful landing of Percy Rover on Mars. |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #249731 · Replies: 122 · Views: 103940 |
| Posted on: Dec 13 2020, 09:37 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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So right across the sand dunes would be the sulphate unit? |
| Forum: MSL · Post Preview: #248951 · Replies: 990 · Views: 555580 |
| Posted on: Jul 22 2020, 07:56 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Another Comet view from Gozo Island! |
| Forum: Chit Chat · Post Preview: #247685 · Replies: 14 · Views: 37077 |
| Posted on: Jul 20 2020, 02:20 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Comet view from Malta |
| Forum: Chit Chat · Post Preview: #247675 · Replies: 14 · Views: 37077 |
| Posted on: Jun 25 2020, 10:42 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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I still cannot come to terms with the idea that Europa has moved from tectonics (ridge formation) onto chaos as the ice crust has thickened over its 4 billion year history. I guess radar should tell us a lot about what is actually happening. |
| Forum: Jupiter · Post Preview: #247501 · Replies: 131 · Views: 207410 |
| Posted on: Jun 18 2020, 04:44 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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QUOTE (JRehling @ Feb 18 2020, 03:21 AM) Triton has a weird (and, of course, very long) "season" but, yes, the sub solar latitude will be nearly equatorial around 2040. It also was just a bit south of equatorial in 1989, so the season will be similar to the Voyager 2 flyby. For the entire time between those, the sub solar latitude has been considerably south and the north polar region has not seen daylight in decades. As a convenient comparison, the length of a Tritonian day is about the same as on Pluto so one might expect similar coverage of a near-encounter and far-encounter hemisphere to that which New Horizons yielded at Pluto. We could have better luck with neptune-shine images of Triton's sub-Neptunian hemisphere since Neptune is brighter than Charon. So by 2040 as Trident flies through the Neptune system, it will be end of summer in the southern hemisphere, do we expect most of the south polar ice deposit seen at the time of Voyager disappear and instead an icy polar cap developing over the northern hemisphere?? |
| Forum: Uranus and Neptune · Post Preview: #247453 · Replies: 30 · Views: 53563 |
| Posted on: Jun 17 2020, 10:41 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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While it's nice to hear about an interest in doing a Triton mission, it's a pity it would have to be a flyby mission. Personally I would prefer an orbiter mission but again timing and costs determine the planning of such missions. |
| Forum: Uranus and Neptune · Post Preview: #247444 · Replies: 30 · Views: 53563 |
| Posted on: Jun 15 2020, 04:08 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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I have been reading up ahead of the launch and hopefully safe landing of Perseverance rover on Mars. I am surprised at the energy constraints the Curiosity rover had to work with given that 110 W are used to generate electricity for rover operations on the surface but a part of it also is' wasted' in keeping the rover parts warm. Has anything changed with the new Perseverance rover regarding energy usage ?? |
| Forum: Perseverance- Mars 2020 Rover · Post Preview: #247401 · Replies: 343 · Views: 431493 |
| Posted on: Apr 27 2020, 01:04 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Was it always planned for the rover to descend off the pediment back onto the clay unit or did I miss something? |
| Forum: MSL · Post Preview: #247179 · Replies: 990 · Views: 555580 |
| Posted on: Mar 8 2020, 06:17 AM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Thanks Phil, pbanholzer.appreciated. |
| Forum: MSL · Post Preview: #246886 · Replies: 990 · Views: 555580 |
| Posted on: Mar 7 2020, 06:46 PM | |
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Member Group: Members Posts: 363 Joined: 13-April 06 From: Malta Member No.: 741
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Greenheugh pediment looks like its going to be a rough traverse for the rover. What does the pediment represent? |
| Forum: MSL · Post Preview: #246881 · Replies: 990 · Views: 555580 |
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