Monday, 1 December 2025
The Young Stars of Taurus
The object captured here by the Hubble Space Telescope is a reflection nebula, identified as GN 04.32.8. Reflection nebulae are clouds of dust in space that don't emit their own light, as other nebulae do. Instead, the light from nearby stars hits and scatters off their dust, lighting them up. Because of the way the light scatters, many reflection nebulae tend to appear blue, including GN 04.32.8.
GN 04.32.8 is a small part of the stellar nursery known as the Taurus Molecular Cloud. At only roughly 480 light-years from Earth in the constellation Taurus, it's one of the best locations for studying newly forming stars. This reflection nebula is illuminated by the system of three bright stars in the centre of this image, mainly the variable star V1025 Tauri in the very centre. One of those stars overlaps with part of the nebula: it is another variable star named HP Tauri. Still, it is classified as a T Tauri star because of its similarity to another variable star elsewhere in the Taurus Molecular Complex. T Tauri stars are very active, chaotic stars at an early stage of their evolution, so it's no surprise that they appear in a prolific stellar nursery like this one! The three stars are also named HP Tau, HP Tau G2, and HP Tau G3; they’re believed to be gravitationally bound to each other, forming a triple system.
Eagle-eyed viewers might notice the small, squashed, orange spot, just left of centre below the clouds of the nebula, that’s crossed by a dark line. This is a newly formed protostar, hidden in a protoplanetary disc that blocks some of its light. Because the disc is edge-on to us, it’s an ideal candidate for study. Astronomers are using Hubble to examine it closely, seeking to learn about the kinds of exoplanets that might form in discs like it.
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