On Space....

 Determination and guidance for interplanetary missions using live data while in orbit Can it be done?? At present orbital trajectory is determined using standard theoretical models of planetary motion and gravitational forces active in solar system. One has to be at the exact location at exact given time. Can one plan to do miscourse corrections while in orbit?? So one would have accurate data of position of nearby planets which are in field of view of the satellite. One being sun, other being some other nearby planets which can be located at set epochs and can be identified by their distinct signature.  So in addition to the standard navigation based on various gravity models, the motion of point mass such as the satellite, the distance being calculated using the standard navigation suites such as gyros etc. One can launch the satellite in a given direction based on the available information. Now as the satellite moves through its trajectory one can locate various planetary ...

 So I saw starship failure. I have already written about it in my another post <https://newagespace60.blogspot.com/2023/05/a-possible-update-for-rocket-propulsion.html?m=1>, I am not a propulsion/ combustion expert; however wherever we see multiple engines being clustered there is always problems of differential performance, there are also problems of number of components increasing and resulting reduction in reliability that can be build up.  So I am rebooting the idea here..... Lets say we need some 10 engines to be clustered together. Now what I am suggesting here is as follows- 1) Let's have a single combustion chamber with multiple injectors for fuel and oxydizers. Let say we have one each for each nozzle connected, thus there can be some 10 fuel injectors and 10 oxydizer injectors each with valve controls for each of them. The fuel and oxydizer can be fed from single tank each.  2) Now as the combustion takes place, one can close the valves mounted in the thro...

  So Elon Musk is famous more for having proven the economy of reusable rocket stages rather than anything else. He has used each stage some 10s of times after first use. However, one is going to notice that he has to sacrifice a lot of payload for achieving this feat some 3-4 tons of payload mass. Thas is a lot. It is because one needs to carry all that extra propellant mass along with LV stage that does not participate in satellite launch but is used for recovery purposes. He literally kills of all that velocity that the LV stage has gained along with working against all that potential energy buildup that has happened. So he may be a good engineer but I don't stand to gain anything to suck up to him, being an Indian government employee which I do not want to be but my parents dont see future anywhere else..... Can we do something else? Let's consider a LV stage having liquid engines, even if one offsets the bearing on the propellant that is put for LV stage recovery, it wou...