If you wanted to study regions where star formation is currently happening you could use:

Question

Quizplus · Accepted Answer

All of the options listed can be used to study regions where star formation is currently happening, as each method involves observing different phenomena associated with the formation of new stars.

A) Hydrogen emission is often used to look for O and B stars, which are typically found in regions of active star formation. These massive stars emit large amounts of ultraviolet radiation, which ionizes surrounding hydrogen gas and creates bright emission nebulae.

B) A radio telescope can be used to search for molecular cloud cores, which are the densest and coldest parts of interstellar gas clouds. These cores are the sites where new stars are most likely to form, as the high densities allow gravity to overcome gas pressure and initiate the collapse of the cloud.

C) Infrared emission can be used to identify T Tauri stars, which are young, low-mass stars in the early stages of formation. These stars emit large amounts of infrared radiation due to their high temperatures and strong magnetic fields, which can be detected by IR telescopes.

By combining these different observational methods, astronomers can get a more complete picture of the various stages of star formation and the physical processes involved.

If You Wanted to Study Regions Where Star Formation Is