Vanishing natural coronagraph of eta Car

Eta Carinae is a massive interacting binary system shrouded in a complex circumstellar environment whose evolution is the source of the long-term brightening observed during the...海山二（Eta Carinae）是一个被复杂星周环境包裹的大质量相互作用双星系统，其演化过程正是观测到的长期增亮现象的成因所在。