Herbig–Haro object

HH objects HH1 and HH2 lie about a light year apart, symmetrically opposite a young star which is ejecting material along its polar axis

Schematic diagram of how HH objects arise

Herbig–Haro (HH) objects are small patches of nebulosity associated with newly born stars, and are formed when narrow jets of gas ejected by those stars collide with nearby clouds of gas and dust at speeds of several hundred kilometres per second. Herbig–Haro objects are ubiquitous in star-forming regions, and several are often seen around a single star, aligned with its rotational axis.

单词	HH Object
释义	HH Object 英语百科 Herbig–Haro object Herbig–Haro (HH) objects are small patches of nebulosity associated with newly born stars, and are formed when narrow jets of gas ejected by those stars collide with nearby clouds of gas and dust at speeds of several hundred kilometres per second. Herbig–Haro objects are ubiquitous in star-forming regions, and several are often seen around a single star, aligned with its rotational axis.
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HH Object

Herbig–Haro object