Mars WILL ALTER ISON'S Orbit! | |
Anonymous Coward User ID: 47060380 Canada 09/28/2013 11:09 AM Report Abusive Post Report Copyright Violation | |
Anonymous Coward User ID: 47309374 United Kingdom 09/28/2013 11:11 AM Report Abusive Post Report Copyright Violation | Dr astro what's your comments on siding spring phil plait said its the end of days Quoting: Anonymous Coward 45796083 It'll probably miss. If it doesn't, it will be the most spectacular astronomical event of our lives. even astro aint callin this one.... off to the store to buy marshmallows!! |
Anonymous Coward User ID: 47060380 Canada 09/28/2013 11:12 AM Report Abusive Post Report Copyright Violation | Astro if siding spring does hit mars, how much risk would there be to earth? Quoting: Anonymous Coward 45796083 Could the martian atmosphere act as a siding spring and set the comet on an unpredictable path? Are more comets coming than in the past ? Or has our ability to detect them just improved ? I suppose there is no way to know.. Actually the number of comets detected so far this year and last is less than in recent years. If Siding Spring hits mars there won't be a comet left, it will vaporize on impact. I haven't calculated the amount of ejecta such an impact would produce, or how much of it would be expected to exceed martian escape velocity. At Least you are admitting to EJECTA. WOW. What a Relief! |
Anonymous Coward User ID: 4210264 United States 09/28/2013 11:13 AM Report Abusive Post Report Copyright Violation | does anyone know what the next comet to come after ison to get all the comettards excited with new doom when ison fails? Quoting: Anonymous Coward 37154178 Here: [link to www.aerith.net] |
Dr. Astro Senior Forum Moderator User ID: 33360181 United States 09/28/2013 11:16 AM Report Abusive Post Report Copyright Violation | Dr astro what's your comments on siding spring phil plait said its the end of days Quoting: Anonymous Coward 45796083 It'll probably miss. If it doesn't, it will be the most spectacular astronomical event of our lives. even astro aint callin this one.... off to the store to buy marshmallows!! I was the first one on GLP to announce the possibility. Thread: Potential Epic Comet Collision with Mars in 2014 *UPDATE: VIDEO ON FIRST POST* |
phoomp User ID: 34814167 Canada 09/28/2013 11:19 AM Report Abusive Post Report Copyright Violation | Don't know about the mars encounter causing ISON to hit earth, but it is rather interesting how the orbit takes it within 7m km... This type of encounter is the same thing we do with space probes to adjust their orbits. Quoting: Billy_Sastard Except: - ISON has A LOT more mass to alter the course of than our space probes. The Cassini space probe weighs 12,593 pounds. Before it was even close to the Sun, ISON was shedding 112,000 pounds of dust *every minute*. - ISON will be A LOT further away from Mars than used for gravity assist course and acceleration changes to our probes. The Cassini Spacecraft came within 370 miles of Venus for it's gravity assist. ISON will be over *7,000,000 miles* from Mars (and Venus is a little less than twice the size of Mars). Last Edited by phoomp on 09/28/2013 11:20 AM |
Anonymous Coward User ID: 36998602 United States 09/28/2013 11:21 AM Report Abusive Post Report Copyright Violation | does anyone know what the next comet to come after ison to get all the comettards excited with new doom when ison fails? Quoting: Anonymous Coward 37154178 ...After ISON...we shall never know. Any information at all will come from staring into the night skies...when they clear from the dust, smoke, and cremains... |
Anonymous Coward User ID: 21980825 United States 09/28/2013 11:25 AM Report Abusive Post Report Copyright Violation | Dr astro what's your comments on siding spring phil plait said its the end of days Quoting: Anonymous Coward 45796083 It'll probably miss. If it doesn't, it will be the most spectacular astronomical event of our lives. It'l PROBABLY miss ???? That isn't very comforting, especially coming from you. Are you saying there is a real possibilty that we could be toast? |
Hydra User ID: 47531162 Germany 09/28/2013 11:28 AM Report Abusive Post Report Copyright Violation | Don't know about the mars encounter causing ISON to hit earth, but it is rather interesting how the orbit takes it within 7m km... This type of encounter is the same thing we do with space probes to adjust their orbits. Quoting: Billy_Sastard Where did you get these numbers? University of YouTube? E.g. Voyager 1 passed Jupiter at a distance of 349,000 kilometers and Saturn at 124,000 kilometers to gain speed and change the orbit. A little difference to your 7 million kilometers, isn't it? And no tonly is the distance much farther, but the mass of the rplanet involved is miniscule compared to either Jupiter or Saturn. It's approacjhing a much smaller body (Mars) at a much greater distance... This encounter isn't going to do a damn thing to Ison's trajectory. Hey now, I was just making a simple observation... What kind of simple observation? That spaceprobes are directed to pass planets at a distance of 7 mill km to change orbit and gain speed? You cannot say, however, that the mars encounter 'wont do a damn thing' to ISONs orbit! In the scale of our solar system, 7m km is pretty damn close! This is definitely close enough for the gravity well of mars to have some effect on the orbital trajectory of a 3km chunk of ice. Quoting: Billy_Sastard Did I say this? - Oh, wait: The distance of ISON to Mars is known since the very first orbit calculations. Quoting: Hydra Do you really think, astronomers are so stupid that they didn't take the approach to mars into account when they calculated the orbit? One has to remember that our space probes have not had very much mass, a mere fraction of the mass of a 3km chunk of ice for sure. Quoting: Billy_Sastard And your point is? And you do? If you know anything about gravity you would know that as the mass of an object increases, so does do the gravitation effects on that object, so a more massive object will be effected at greater distances. Quoting: Billy_Sastard I see you do - except, you got it the wrong way round: The more massiv an object, the greater the gravitational pull on other objects and the greater the distance of influence. Although both objects (Mars and spaceprobe/ISON) exert a gravitational force to each other, because of the mass of the spacecraft resp. ISON the force of the spacecraft or ISON excerted on Mars can be neglected. Thus it makes no difference, if a 400 kg spacecraft is exerted to the gravitational force of Mars or a comet, still with almost no mass compared to the mass of Mars. What I am NOT saying is that the encounter is going to drastically effect the orbit, or that it will 'fling' the comet into the earth, Quoting: Billy_Sastard That's a good thought. my argument is simply that the mars encounter will have some effect on the trajectory... Heck, if anything, the encounter could cause the comet to have a closer encounter with the sun and it will never come back from the far side. Quoting: Billy_Sastard Again: The distance of ISON to Mars is known since the very first orbit calculations. Quoting: Hydra Do you really think, astronomers are so stupid that they didn't take the approach to mars into account when they calculated the orbit? . :ase26122019: Annular Solar Eclipse - December 26, 2019 - Kannur, Kerala, India |
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phoomp User ID: 34814167 Canada 09/28/2013 11:32 AM Report Abusive Post Report Copyright Violation | Dr astro what's your comments on siding spring phil plait said its the end of days Quoting: Anonymous Coward 45796083 It'll probably miss. If it doesn't, it will be the most spectacular astronomical event of our lives. It'l PROBABLY miss ???? That isn't very comforting, especially coming from you. Are you saying there is a real possibilty that we could be toast? An impact to Mars by Siding Spring is not an impact to Earth. |
Hydra User ID: 47531162 Germany 09/28/2013 11:35 AM Report Abusive Post Report Copyright Violation | where did you get your astronomy phd from? the university of glp? Quoting: Anonymous Coward 37154178 Actually he's right. When they calculated its orbit they laft out Planetary Encounters out of the calculations. Thats been up on their own Websites. They cannot calculate somthing thats an unknown. So there you have it and we will all have to wait until MONDAY and TUESDAY for the news! Can you provide any link to the page where they said this? I guess, you refer to the JPL two bodies orbit viewer. The JPL Horizon has the orbit considering the gravitational influence of other bodies. . :ase26122019: Annular Solar Eclipse - December 26, 2019 - Kannur, Kerala, India |
Anonymous Coward User ID: 46761862 United States 09/28/2013 11:58 AM Report Abusive Post Report Copyright Violation | Hydra ( Dr.(?) Asstro ?).... NICE confusion of the ONLY 'facts' YOU present as argument .... Distance of the Voyager and ISON, WHILE NEGLECTING that the formula for gravity IS concerned with the distances of the masses of BOTH OBJECTS in question ; i.e. The mass of Voyager was EXTREMELY SMALL, when compared to the MASS OF ISON, Shill/fool ! |
Dr. Astro Senior Forum Moderator User ID: 33360181 United States 09/28/2013 12:00 PM Report Abusive Post Report Copyright Violation | Hydra ( Dr.(?) Asstro ?).... NICE confusion of the ONLY 'facts' YOU present as argument .... Distance of the Voyager and ISON, WHILE NEGLECTING that the formula for gravity IS concerned with the distances of the masses of BOTH OBJECTS in question ; i.e. The mass of Voyager was EXTREMELY SMALL, when compared to the MASS OF ISON, Shill/fool ! Quoting: Anonymous Coward 46761862 ISON's mass is negligible compared to the planets. |
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Anonymous Coward User ID: 46761862 United States 09/28/2013 12:05 PM Report Abusive Post Report Copyright Violation | AH ! Dr.(?) Asstro back in place of Hyrdant, WITH the mass of ISON compared to that of planets; a statement that does NOT address the question/FACT that hydrant left out the extremely SMALL MASS OF Voyager of voyager that WAS still affected by the planets, V.S. the Millions of times the mass of ISON in the gravity equation ! SMALL minds get stuck in their LIES, don't they Asstro ? |
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Anonymous Coward User ID: 47015795 Germany 09/28/2013 12:26 PM Report Abusive Post Report Copyright Violation | ISON will encounter Mars near directly over the north pole on Oct 1st. NASA's JPL, and indeed all orbital diagrams relied upon ]do not factor planetary encounter circumstances! And since ISON will be so close to Mars, there is sure to be orbital change, due to the gravitational effects of both bodies! The possible end result is that Mars will (gravitationally) fling ISON towards Earth! Quoting: Kalki 12772450 Yes. In your face! |
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Dr. Astro Senior Forum Moderator User ID: 33360181 United States 09/28/2013 12:47 PM Report Abusive Post Report Copyright Violation | AH ! Dr.(?) Asstro back in place of Hyrdant, WITH the mass of ISON compared to that of planets; a statement that does NOT address the question/FACT that hydrant left out the extremely SMALL MASS OF Voyager of voyager that WAS still affected by the planets, V.S. the Millions of times the mass of ISON in the gravity equation ! Quoting: Anonymous Coward 46761862 SMALL minds get stuck in their LIES, don't they Asstro ? Of course Voyager was affected by the gravity of the planets, so is ISON. M1>>>>>>>>>>>M2 in both cases, so it's the same situation for both. But as Hydra correctly, pointed out, the gravity of the planets on ISON is already accounted for. |
Anonymous Coward User ID: 39337837 United States 09/28/2013 01:08 PM Report Abusive Post Report Copyright Violation | ISON will encounter Mars near directly over the north pole on Oct 1st. NASA's JPL, and indeed all orbital diagrams relied upon ]do not factor planetary encounter circumstances! And since ISON will be so close to Mars, there is sure to be orbital change, due to the gravitational effects of both bodies! The possible end result is that Mars will (gravitationally) fling ISON towards Earth! Quoting: Kalki 12772450 |
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Anonymous Coward User ID: 15087980 United Kingdom 09/28/2013 01:17 PM Report Abusive Post Report Copyright Violation | Dr astro what's your comments on siding spring phil plait said its the end of days Quoting: Anonymous Coward 45796083 It'll probably miss. If it doesn't, it will be the most spectacular astronomical event of our lives. What do you mean by probably ? Ok seen that thread now. |
Hydra User ID: 47531162 Germany 09/28/2013 01:46 PM Report Abusive Post Report Copyright Violation | Hydra ( Dr.(?) Asstro ?).... NICE confusion of the ONLY 'facts' YOU present as argument .... Distance of the Voyager and ISON, WHILE NEGLECTING that the formula for gravity IS concerned with the distances of the masses of BOTH OBJECTS in question ; i.e. The mass of Voyager was EXTREMELY SMALL, when compared to the MASS OF ISON, Shill/fool ! Quoting: Anonymous Coward 46761862 How about enlighten us and providing the math to substantiate your claim? F = G * [(m1 * m2) / r^2] With: F = force between the masses G = gravitational constant m1 = mass of Mars m2 = mass of ISON resp. a spacecraft (with let's say 800 kg) r = distance between the centers of the masses Take the closest approach of ISON to Mars (0.07248 AU) Take ISONS diameter as 4 km and the specific weight as 0.9 g/cm3 (Lets simplify it and assume ISON and the spacecraft are spherical) Waiting for your calculation of the forces between Mars and ISON resp. an 800 kg spacecraft in SI units. . :ase26122019: Annular Solar Eclipse - December 26, 2019 - Kannur, Kerala, India |
Hydra User ID: 47531162 Germany 09/28/2013 01:47 PM Report Abusive Post Report Copyright Violation | ISON will encounter Mars near directly over the north pole on Oct 1st. NASA's JPL, and indeed all orbital diagrams relied upon ]do not factor planetary encounter circumstances! And since ISON will be so close to Mars, there is sure to be orbital change, due to the gravitational effects of both bodies! The possible end result is that Mars will (gravitationally) fling ISON towards Earth! Quoting: Kalki 12772450 No, he is wrong and you too. . :ase26122019: Annular Solar Eclipse - December 26, 2019 - Kannur, Kerala, India |