Sounds like a predecessor of the Michael Crichton book/film Sphere.
A spacecraft, presumed to be of alien origin, is discovered on the floor of the Pacific Ocean, estimated to have been there for nearly 300 years...Soon after, Goodman and the others eventually stumble upon a large, yet perfect sphere hovering in the cargo bay. They cannot find any way to probe the inside of the sphere, as the fluidic surface seems to be impenetrable. Upon observation, Goodman ominously notes the sphere reflects everything in the room except them.
Pity. Do you have a mirror?
Despite the fact that the film is officially based on Strugatsky 1972 novel Roadside Picnic, the sphiere idea from resemblance 'the Room'.
Sounds like an inspiration from 2001: A space Odyssey.
Only that in 2001 it was a cuboid instead of a sphere
and the color was black instead red
Also reminds me of Barjavel's 'The ice people' which has a large golden sphere buried deep under the ice in Antarctica