Designer-Wolverine47 t1_jd5fypy wrote on March 21, 2023 at 11:29 PM

Reply to comment by otatop in Is there another massive planet beyond Neptune? If so, why haven’t we found it? by Always2ndB3ST

One way would be to send out two observatories in perpendicular directions then at a sufficient(?) distance, have them look back at the sun and look for unexpected perturbations. Then calculate.

It wouldn't be cheap though...

cantwejustbefiends t1_jd5khps wrote on March 22, 2023 at 12:01 AM

With this object being so far away, and a possible 10,000 year orbit, it would take a long long long time to make out perturbations due to it.

Designer-Wolverine47 t1_jd6ow5y wrote on March 22, 2023 at 5:53 AM

Then we should hurry up and start it...