Linked Questions

11
votes
6answers
3k views

Has any space probe changed course (in a large way) over time?

I encountered the following text from here: Generally, a spacecraft is launched with huge rockets into a certain trajectory, or path, and it continues on that that path. Often the smaller rockets ...
6
votes
3answers
6k views

Why is Voyager 1 faster than all other space probes?

From the Wikipedia article, List of artificial objects leaving the Solar System: Although other probes were launched first, Voyager 1 was able to achieve a higher speed and has overtaken all others. ...
17
votes
4answers
3k views

Are some Halo Orbits actually Stable? (stable orbits about unstable Lagrange points)

update: some more sources; the broken site spacecraftforall.com/a-new-orbit used to have an interactive simulation, here's an old screen shot: Hat tip to @NgPh for finding this Space College page ...
17
votes
2answers
930 views

Spacecraft Maneuvers as Intellectual Property? Wow!

In the past I had encountered a few mentions of orbits being patented (or at least applications filed) but didn't take much notice. Then I did a simple search and was blown away by the sheer volume of ...
8
votes
1answer
177 views

Why was ISEE-3 "the most cost-effective spacecraft we ever had"?

NPR's 2014 news article and audio podcast: Space Thief Or Hero? One Man's Quest To Reawaken An Old Friend quotes Robert Farquhar (NASA, Wikipedia) when discussing the ISEE-3 mission before the ISEE-3 ...
5
votes
1answer
323 views

How could tiny Hagoromo have been seen visually from earth confirming its lunar orbit?

I saw the following sentence in The Space Review, and became intrigued: Japan’s Hagoromo lunar orbiter, deployed in 1990, reached orbit but ceased transmitting enroute. If it ceasted transmitting ...
4
votes
1answer
274 views

Would lunar flyby be less costly in delta-v than direct change from ISS's to Hubble's orbit?

The question Has anything ever executed an orbit change such as between ISS and Hubble? has a in interesting answer. It made me wonder, would something like the (patented) Lunar Flyby technique use ...
3
votes
1answer
239 views

What's next for New Horizons?

Five years ago What's after Pluto for New Horizons? was asked, and the answer turned out to be at first 'something in the Kuiper belt if we can find a good candidate' and finally 2014 MU69. But now ...
1
vote
1answer
107 views

How could tiny nanosatellite Hagoromo with a 4 kg solid propellant rocket inside maintain attitude control?

To the question Hagoromo was a ~36cm nano satellite that was deployed by Hiten while Hiten was in a highly elliptical orbit around the earth, in 1990. From there, Hagoromo was able to enter into an ...
1
vote
1answer
119 views

Was Hagoromo's capture into lunar orbit ballistic capture or more propulsive?

Hagoromo was a ~36cm nano satellite that was deployed by Hiten while Hiten was in a highly elliptical orbit around the earth, in 1990. From there, Hagoromo was able to enter into an orbit around the ...
5
votes
0answers
110 views

What (if any) key mission events ended up falling on birthdays or anniversaries due to fine tuning by Robert Farquhar?

NPR's 2014 news article and audio podcast: Space Thief Or Hero? One Man's Quest To Reawaken An Old Friend says of Robert Farquhar (NASA, Wikipedia): Farquhar is now 81 years old. He's been called the ...