Stars - NASA Science
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 trillions of years, and its properties change as it ages.
Star Types - Science@NASA
Types of Stars. The universe’s stars range in brightness, size, color, and behavior. Some types change into others very quickly, while others stay relatively unchanged over trillions of years.
Exploring the Birth of Stars - NASA Science
NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. Stars form in large clouds of gas and dust called nebulae that scatter the visible wavelengths of light our eyes can see.
The Lives, Times, and Deaths of Stars - NASA Science
2020年9月16日 · These and planetary nebulae from low-mass stars are the sources of many of the elements we find on Earth. Their dust and gas will one day become a part of other stars, starting the whole process over again. That’s a very brief summary of the lives, times, and deaths of …
Star Lifecycle - Science@NASA
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 begun to understand them in detail only in recent times through the …
Stars Images - NASA Science
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 the brightest stars in our Milky Way galaxy.
Solar System Exploration - NASA Science
NASA explores the unknown in air and space, innovates for the benefit of humanity, and inspires the world through discovery. The solar system has one star, eight planets, five dwarf planets, at least 290 moons, more than 1.3 million asteroids, and about 3,900 comets.
Hubble Skymap - NASA Science
The Hubble Skymap puts the night sky at your fingertips any time of day. Roam the Milky Way to find a selection of galaxies, stars, nebulae and more, and click for a Hubble's-eye-view of each object.
Stars in an Exoplanet World - NASA Science
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.
Multiple Star Systems - Science@NASA
These multiple star systems come in a stunning variety of flavors: large, hot stars orbited by smaller, cooler ones; double stars orbited by planets; pairs pulsing with X-rays as one sheds material that is devoured by the other; systems with as many as seven stars in a complex gravitational dance.