侦测

Working on a comparable timescale, SIM should provide positional information for a subsample of faint stars, thereby probing the most tenuous star streams.

同时，SIM应能提供黯淡恒星次级样本的位置资讯，从而侦测最稀薄的恒星流。

Ambitious future observers might also send out probes that escape the supergalaxy and could serve as reference points for detecting a possible cosmic expansion.

有企图心的来观测者，或许会发射一能够脱离超级星系的探测器，做为侦测宇宙膨胀的参考点。