download for last week:4Sail into the Clouds
download for last week:0Giraffe with colored socks
download for last week:0Reaching For The Stars
download for last week:1Good night!
download for last week:0Were Watching...
download for last week:1Blue Stars
download for last week:1Coastal Skyline
download for last week:0Night Tree
download for last week:0Christmas Season
download for last week:0Creative Green House
download for last week:0Spark
download for last week:10Outdoors
download for last week:2Robotman Not Connected
download for last week:22Cuteness
download for last week:0Red Apples
A star is a luminous sphere of plasma held together by its own gravity. The nearest star to Earth is the Sun. Other stars, mostly in the Milky Way, are visible from Earth during the night, appearing as a multitude of fixed luminous points in the sky due to their immense distance from Earth. Historically, the most prominent stars were grouped into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations. For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen into helium in its core, releasing energy that traverses the star's interior and then radiates into outer space. Once the hydrogen in the core of a star is nearly exhausted, almost all naturally occurring elements heavier than helium are created by stellar nucleosynthesis during the star's lifetime and, for some stars, by supernova nucleosynthesis when it explod...