Email or username:

Password:

Forgot your password?
John Carlos Baez's posts Post Back to profile
Top-level
Greg Egan

@johncarlosbaez

Typo: it’s 2.5 million km separation, not 25 million km.

It’s kind of sad that the operational lifetime of LISA is only expected to be 4 to 6 years.

28 January at 0:02 | Wall-to-wall | Open on mathstodon.xyz
3 comments
Jim Flanagan

@gregeganSF @johncarlosbaez Don’t know when the alien archaeologists are meant to arrive, but that 4-6 years seems about right for the collapse of civilization.

28 January at 1:03 | Open on hachyderm.io
John Carlos Baez

@gregeganSF - I wonder what will spell the end of LISA. The satellites do need propellant to stay on course. The proof-of-concept mission LISA Pathfinder used "micronewton thrusters" that shot out cold gas.

scholar.archive.org/work/5r3qr

28 January at 2:25 | Open on mathstodon.xyz
Leo C. Stein

@johncarlosbaez @gregeganSF Spacecraft engineers have a tendency to do such a good job that their consumables often get stretched by factors of 2 or more!

28 January at 4:42 | Open on mastodon.social
Go Up