Sun
The Sun is the star located at the solar system’s center. Its gravity holds the solar system as a whole together. It accounts for about 99.86% of the total solar system’s mass.
Hydrogen is about 73% of the Sun’s total mass; the rest is mostly Helium (25%), with a small quantity of oxygen, carbon, neon, and iron. The hottest part of the Sun is its core, where temperatures top 27 million degrees Fahrenheit (15 million degrees Celsius).
The core is the place where it generates enormous amounts of energy through the nuclear fusion reaction. It mainly radiates energy through visible light, ultraviolet, and infrared radiation.
Astronomers discovered a death-defying planet
The star would have inflated up to 1.5 times the planet’s orbital distance.
NASA’s MAVEN Spacecraft acquired stunning views of Mars
The images were taken at different points.
Our Galaxy’s black hole emerged from a long period of dormancy
Study revealed the past awakening of this gigantic object.
Telescope captured charge-sign dependent cosmic ray modulation
The results indicate that cosmic ray electron count rates are strongly influenced by the solar modulation.
Intense wave energy discovered in the coldest region on the Sun
How are temperatures in the corona hundreds of times hotter than temperatures at the Sun’s visible surface?
Parker Solar Probe flies into the fast solar wind and finds its source
It’s like seeing jets of water emanating from a showerhead through the blast of water.
Solar eruptions may have formed the first building blocks of life on Earth
A stormy, active Sun may have kickstarted life.
First close-ups of a source of energetic particles expelled from the Sun
Close-up views of energetic particle jets ejected from the Sun.
First evidence of a dying Sun-like star engulfing an exoplanet
Astronomers using the Gemini South telescope in Chile, operated by NSF’s NOIRLab, have observed the first evidence of a dying Sun-like star engulfing an...
A complete picture of a superflare on a star
Superflare with massive, high-velocity prominence eruption.
Lab-grown solar flares offer clues on mechanism behind bursts of high-energy particles
Simulating solar flares on a scale the size of a banana.