Galaxies on Instagram: "These are protostars✨ A protostar is a “baby star,” the earliest stage of stellar evolution, forming from a collapsing cloud of gas and dust (a nebula) where gravity pulls material together, generating heat but not yet undergoing nuclear fusion. It glows from this gravitational contraction, often hidden by dust, and is surrounded by a spinning disk of material that can form planets, eventually becoming a full star once its core gets hot enough for fusion. Credit: NASA"

This new @NASAHubble image focuses on a small but visually striking structure embedded within the Trifid Nebula, a well-known stellar nursery about 5,000 light-years away in Sagittarius. This object has been nicknamed a “cosmic sea lemon” or “cosmic sea slug” because of its shape, but physically it is a dense, evolving region of gas and dust associated with the early stages of star formation. Hubble had already imaged this same region in 1997, and astronomers deliberately revisited it to create

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