In Depth | Sun – NASA Solar System Exploration
The Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star.
The heat, light, and solar wind from the sun provide an energy source for most processes on the Earth’s surface. Heat, absorbed by the atmosphere and oceans, powers storms and other weather and climate
In Depth | Our Solar System – NASA Solar System Exploration
Our solar system consists of our star, the Sun, and everything bound to it by gravity – the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune; dwarf planets such as Pluto; dozens of moons; and millions of asteroids, comets, and meteoroids.
Giant stars have masses from eight times to as much as 100 times that of the mass of our sun. These massive stars have hotter and denser cores than dwarf stars (stars that are smaller than five times the mass of our sun). Therefore, giant stars have a greater rate of the nuclear reactions that light up stars. Massive stars also use up the ...
dwarf stars are stars with about six to eight solar masses. Their luminosities, or brightnesses, are about 100 times that of the sun, and they use up the hydrogen fuel in their cores in only 100 million years. The least massive dwarf stars are puny compared to …
Genesis : Search for Origins | Science - Solar Wind, Genesis, and …
The Genesis mission's study of the solar wind will aid in astrophysicists' understanding of structures inside the nearest star, the solar source of Earth's light and heat. + Freedom of Information Act
from the Sun. The nearest star to the Sun would be the size of a cherry in California. In this lesson, students will design a scale model Solar System that will turn out to have a scale very close to that of Voyage. Review of Scale Models In a scale model, all linear sizes and distances are reduced or enlarged
neutron star will have more than 10 billion times as much mass as our sun, yet it will only be about 10 kilometers in size (our sun is more than a million kilometers across). A centimeter cube of neutron star material one would weigh more than a billion tons here on Earth, and
Stardust | JPL - NASA
The dust lies mainly in a ring around the star, with a radius of 60 Astronomical Units (60 times the size of the Earth's orbit). The star itself was not seen, because its small, hot surface radiates very little at submillimetre wavelengths.
Planet Compare – NASA Solar System Exploration
Dec 19, 2024 · NASA’s real-time science encyclopedia of deep space exploration. Our scientists and far-ranging robots explore the wild frontiers of our solar system.