Quote from: Danderman on 09/09/2013 02:56 pmHubble will be killed off shortlyAre there any references to this?
Hubble will be killed off shortly
An Orion Hubble servicing mission would be far more useful than a mission to a captured and moved asteroid.
Quote from: HappyMartian on 09/11/2013 11:00 amAn Orion Hubble servicing mission would be far more useful than a mission to a captured and moved asteroid.Both are still better than a lunar mission.
Quote from: Danderman on 09/09/2013 05:22 pmQuote from: Jim on 09/09/2013 03:23 pmWhere are the "batteries and gyros" going to be carried?These won't fit inside the Orion command module?What? The astro won't fit into the CM?No, those aren't gyros and especially not the astronaut.
Quote from: Jim on 09/09/2013 03:23 pmWhere are the "batteries and gyros" going to be carried?These won't fit inside the Orion command module?
Where are the "batteries and gyros" going to be carried?
It is unlikely that an Orion mission to service Hubble will ever be approved or funded - such a mission would cost a couple billion. The money spent would be better off going towards a true Hubble replacement, such as a Large Aperture Telescope. http://www.stsci.edu/institute/atlast
Quote from: MATTBLAK on 09/11/2013 11:24 amIt is unlikely that an Orion mission to service Hubble will ever be approved or funded - such a mission would cost a couple billion. The money spent would be better off going towards a true Hubble replacement, such as a Large Aperture Telescope. http://www.stsci.edu/institute/atlast What requirements would drive mission costs into the billions of dollars?
Quote from: Danderman on 09/21/2013 05:50 amQuote from: MATTBLAK on 09/11/2013 11:24 amIt is unlikely that an Orion mission to service Hubble will ever be approved or funded - such a mission would cost a couple billion. The money spent would be better off going towards a true Hubble replacement, such as a Large Aperture Telescope. http://www.stsci.edu/institute/atlast What requirements would drive mission costs into the billions of dollars?An Orion Hubble LEO servicing mission side by side cost comparison with all the combined costs of the beyond LEO robotic vehicle that captures and hauls a small asteroid and the Orion mission that would be involved with visiting and sampling the asteroid would be interesting.Directly comparing the real risks through Loss of Mission and Loss of Crew numbers would also be useful.The likely scientific output of frequently cited research papers that could be enabled by these two different types of missions should also be carefully compared.
On the same note, if Orion cannot carry HST batteries and gyros, the NASA has a bigger problem that Hubble falling into the ocean some day.
I am assuming that the designs NASA is proposing for the asteroid mission would be available for a Hubble Servicing Mission. IF NASA is proposing a variant of Orion for the asteroid mission that, for example, could support EVA, but which cannot be done for an HST servicing mission, I give up.
Quote from: Danderman on 09/25/2013 05:03 pm I am assuming that the designs NASA is proposing for the asteroid mission would be available for a Hubble Servicing Mission. IF NASA is proposing a variant of Orion for the asteroid mission that, for example, could support EVA, but which cannot be done for an HST servicing mission, I give up.There is no comparison.The EVA for asteroid mission is short and only two crew and only involves obtaining some samples. It is nothing like an HST repair which took multiple shifts of two crewmembers and an IVA crewmember to operate the arm.
Please explain why a gyro and battery replacement operation from a docked Orion requires an arm, or extended EVAs.
Quote from: Danderman on 09/25/2013 07:54 pmPlease explain why a gyro and battery replacement operation from a docked Orion requires an arm, or extended EVAs.You're the expert, explain how it is done without the arm and not multiple EVA's and even with the arm explain how it is not done with multiple EVAs?
Even replacing the instruments could be relatively easy with a special-purpose derrick (Russian-style) rather than a complex and expensive arm.But then, IMHO, the whole thing would easier with a Dragon simply because it can carry external cargo without any modifications.