| When the orbit brings the stars close together, as this image shows, gas from the Be star's circumstellar disc flows towards the neutron star and surrounds it in a much smaller accretion disc. |
| Superluminal light echoes were seen as light from the outburst propagated into the surrounding, pre-existing circumstellar dust. |
| Learning in your sleep ReprintsAt around 3m years of age, KH 15D is a real youngster, so the presence of a circumstellar disc of debris, left over from its formation, is not surprising. |
| An outflow develops and the star is progressively surrounded by an expanding circumstellar shell of dust and gas. |
| A protoplanetary disk is a circumstellar disk of dense gas that surrounds a newly formed star. |
| This represents a privileged region for the search for low mass companions, circumstellar disks, or even of Active Galaxy Nuclei. |
