Gravity Waves.

[kk67]

I saw Professor David Tong talking about this at a festival.
Not only is he fascinating,.........but he seems pretty sure that the project to measure them is going ahead.
3 satellites in an equilateral triangle, firing lasers at each other over a distance of 3,000,000 km.

[Lizard]

Thats's actually "gravitational waves." "Gravity waves" are something quite different.

[kk67]

My apologies. It was a 'long and stressful' weekend.

[Lizard]

Apology accepted. Don't do it again. RR would fall apart without rigorously accurate use of scientific terminology.