[lemma=indirect] [lemma=□]
[lemma=indirect] [lemma=evidence]
[lemma=indirect] [lemma=indirect]
" This is the first independent confirmation of a planet discovered through changes in a star 's radial velocity and demonstrates that our indirect evidence for planets really is due to planets , " said Geoffrey Marcy , professor of astronomy . They also found indirect evidence to support the idea that subsidence of some oceanic volcanoes actually does take place . However , all wetland delineation manuals require direct or indirect evidence of saturation or inundation . Since those structures are usually inaccessible , scientists have had to rely on indirect evidence , such as studying how man-made earthquake waves interact with underlying rock ( seismic reflection profiling ) , or visiting the eroded remains of very old ocean crust that have been uplifted onto dry land ( ophiolites ) . More often , scientists have indirect evidence .