Give me a hand analyzing this sentence

[outofdejavu]

Dear All,

I tried hard to figure out what on earth the "which" suggests.
It keeps confounding me.

--quote--

Having formed only about 20 million years ago, Beta Pictoris is just about
the age when we would expect it to have a disk, and so far it is the only star around which one has been observed.

--end quote--

If which = the (only) star = it = Beta Pictoris, it seems not to make any sense to me. What does the "one" suggest?

If which = the disk, it makes little sense. But "the disk" is a bit far from "which"...kind of strange.


Best Regards

[engee30]

Dear All,

I tried hard to figure out what on earth the "which" suggests.
It keeps confounding me.

--quote--

Having formed only about 20 million years ago, Beta Pictoris is just about
the age when we would expect it to have a disk, and so far it is the only star around which (= star) one (= disk) has been observed.

--end quote--

If which = the (only) star = it = Beta Pictoris, it seems not to make any sense to me. What does the "one" suggest?

If which = the disk, it makes little sense. But "the disk" is a bit far from "which"...kind of strange.


Best Regards

[outofdejavu]

Thank you.
Does it also mean that the disk around Beta Pictoris is the only one?

[engee30]

Thank you.
Does it also mean that the disk around Beta Pictoris is the only one?

Yes, it does.