May 2, 2025 · Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements. Every star has its own life cycle, ranging from a few million to …

Oct 22, 2024 · Scientists call a star that is fusing hydrogen to helium in its core a main sequence star. Main sequence stars make up around 90% of the universe’s stellar population.

Dec 11, 2024 · Stars are the most basic building blocks of galaxies. The age, distribution, and composition of stars trace the history, dynamics, and evolution of their galaxy.

Jun 1, 1999 · In this stunning picture of the giant galactic nebula NGC 3603, the crisp resolution of NASA's Hubble Space Telescope captures various stages of the life cycle of stars in one …

Sep 16, 2020 · All stars are born in clouds of dust and gas like the Pillars of Creation in the Eagle Nebula pictured below. In these stellar nurseries, clumps of gas form, pulling in more and …

Sep 28, 2023 · Groups of stars make up galaxies, while planets and ultimately life arise around stars. Although stars have been the main topic of astronomy for thousands of years, we have …

Aug 7, 2025 · Overview The space between stars is dotted with twisting towers studded with stars, unblinking eyes, ethereal ribbons, and floating bubbles. These fantastical shapes, some …

Apr 10, 2025 · Stars form in large clouds of gas and dust called nebulae that scatter the visible wavelengths of light our eyes can see. Hubble’s capability to see ultraviolet, visible, and near …

Mar 28, 2024 · The ULLYSES program studied two types of young stars: super-hot, massive, blue stars and cooler, redder, less massive stars than our Sun. The top panel is a Hubble Space …

Sep 14, 2023 · A brilliant tapestry of young stars flaring to life resembles a glittering fireworks display in this Hubble Space Telescope image.... The mighty blue giant AG Carinae is one of …