|
Australia-VIC-DANDENONG Azienda Directories
|
Azienda News:
- Stars - NASA Science
Stars form in large clouds of gas and dust called molecular clouds Molecular clouds range from 1,000 to 10 million times the mass of the Sun and can span as much as hundreds of light-years Molecular clouds are cold which causes gas to clump, creating high-density pockets Some of these clumps can collide with each other or collect more matter
- Star Types - Science@NASA
The star starts fusing helium to carbon, like lower-mass stars But then, when the core runs out of helium, it shrinks, heats up, and starts converting its carbon into neon, which releases energy This process continues as the star converts neon into oxygen, oxygen into silicon, and finally silicon into iron
- The Lives, Times, and Deaths of Stars - NASA Science
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 more mass as time passes As they grow, these clumps start to spin and heat up Once they get heavy and hot enough (like, 27 million degrees Fahrenheit or 15 million degrees Celsius), nuclear fusion starts in their cores
- Star Lifecycle - Science@NASA
Stars, like our Sun, can be thought of as "basic particles" of the Universe, just as atoms are "basic particles" of matter 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
- Hubble Snapshot Captures Life Cycle of Stars - Science@NASA
This picture nicely illustrates the entire stellar life cycle of stars, starting with the Bok globules and giant gaseous pillars (evidence of embryonic stars), followed by circumstellar disks around young stars, and progressing to aging, massive stars in a young starburst cluster The blue super-giant with its ring and bipolar outflow [upper
- Multiple Star Systems - Science@NASA
Two stars orbit each other in a binary system in this animation NASA's Goddard Space Flight Center Chris Smith (USRA) Binary Stars The variety seen in double-star systems is nearly as rich as the galaxy’s stellar population as a whole These pairs can differ significantly in mass, with, say, a mid-sized yellow star like our Sun locked in an
- Hubbles Nebulae - Science@NASA
White dwarf stars are objects with the approximate mass of the Sun but the size of the Earth, making them one of the densest forms of matter in the universe after black holes and neutron stars The white dwarf star's ultraviolet radiation ionizes the gas of the planetary nebula and causes it to glow, just as stars do in emission nebulae
- Star Types - Science@NASA
The universe’s stars range in brightness, size, color, and behavior Some types described in this article are main sequence stars, red giants, white dwarfs, neutron stars, red dwarfs, and brown dwards
- Solar System Exploration - Science@NASA
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
- Symphony of stars: The science of stellar sound waves
Stellar vibrations also help scientists determine how old a star is, which will affect the environment of its planets A young star is more likely to have violent outbursts, and its planets may still be shuffling around in their orbits An older star has less frequent flare-ups, and its planets may be more stable
|
|