White House wants Nasa to slow hunt for killer asteroids in 'baffling' move

The Straights Times ^ | 09/01/2022

[Elsie]

Most democrats don’t even know what an asteroid is.

Street cant for hemorrhoid.

[SunkenCiv]

Waste of money, no, pork barrel, yes, anything to grab and hold power. Shelby jumped parties to keep that going for himself.

That’s why we’ve had decades of the go-nowhere ISS, and why the overpriced and dangerous STS continued for such a long while. The unmanned probes exploring the planets and the orbiting observatories have been a relative bargain.

[Lonesome in Massachussets]

If you work out time of the equinox in Meeus's Astronomical Algorithms there is a term for the effect of the moon, which shifts the time about two and a half minutes year to year. The orbital velocity of the earth is about 30 km/second, the displacement of the earth center from the barycenter of the earth-moon is about 4700 km. 4700/30 ~ 157 seconds. This is easily the largest perturbing term in calculation of the orbit of the earth, but well modeled and understood. In Meeus's formula for calculating the phase of the moon there are over 250 parameters, including terms for planets including Jupiter, Saturn, Venus, and Mercury. Meeus is for amateurs (like me). Sophisticated models are far more complete.