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  • Stars - NASA Science
    Astronomers call stars that are stably undergoing nuclear fusion of hydrogen into helium main sequence star s This is the longest phase of a star’s life The star’s luminosity, size, and temperature will slowly change over millions or billions of years during this phase Our Sun is roughly midway through its main sequence stage
  • Types - NASA Science
    The universe’s stars range in brightness, size, color, and behavior Some types change into others very quickly, while others stay relatively unchanged over
  • The Lives, Times, and Deaths of Stars - Science@NASA
    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 stars
  • Stars in an Exoplanet World - Science@NASA
    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
  • Star Lifecycle - NASA Science
    Young stars within a star-forming region interact with each other in complex ways The details of how they evolve and release the heavy elements they produce back into space for recycling into new generations of stars and planets remains to be determined through a combination of observation and theory
  • 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 To explore the skymap, scroll, double click, or pinch swipe to zoom in and out Roll over an icon to see the object, click to zero in, and click again for a detailed view and a description Drag
  • Multiple Star Systems - NASA Science
    Multiple Star Systems Our solar system, with its eight planets orbiting a solitary Sun, feels familiar because it's where we live But in the galaxy at large, planetary systems like ours are decidedly in the minority More than half of all stars in the sky have one or more partners These multiple star systems come in a stunning variety of flavors: large, hot stars orbited by smaller, cooler
  • Stars Images - NASA Science
    Stars Images NASA's Neil Gehrels Swift Observatory imaged the extremely luminous afterglow of explosion GRB 080319B using its X-ray Telescope (left) and NASA's Wide-field Infrared Survey Explorer (WISE) mission captured this mosaic of the Heart and Soul nebulae Located about 6,000 light-years
  • What’s a Nova? Inside the Chaos of Erupting and Exploding Stars
    Stars — they shimmer in the night sky, burning hot across the cosmos But sometimes … they erupt Enter: novae In short, a nova is an outburst in a binary system, or system with two stars that closely orbit one another In all known novae, one of the stars in the system is a white dwarf, which is the leftover core of a star like our Sun after it runs out of fuel Its companion will
  • Planetary Systems - NASA Science
    Planetary Systems Our solar system consists of the Sun, whose gravity keeps everything from flying apart, eight planets, hundreds of moons, and billions of smaller bodies – from comets and asteroids to meteoroids and tiny bits of ice and rock Similarly, exoplanetary systems are groups of non-stellar objects circling stars other than the Sun, and astronomers have found thousands of them





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