In an H-R diagram,pre-main-sequence stars are above and to the right of the main sequence.

Name: In an H-R diagram,pre-main-sequence stars are above and to the right of the main sequence.
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Pre-main-sequence stars are in the upper right region of the H-R diagram, indicating that they are large and hot but have not yet begun to fuse hydrogen in their cores. Once they begin fusing hydrogen and become main sequence stars, they move down and to the left on the diagram.

In an H-R Diagram,pre-Main-Sequence Stars Are Above and to the Right