Temperatures in the Sun's core exceed 10 million degrees Celsius. But how on Earth did we actually come to know that?
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It took 9.2 billion years of cosmic evolution before our Sun and Solar System even began to form. Such a small event has led to so much.
Despite the Sun's high core temperatures, particles can't quite overcome their mutual electric repulsion. Good thing for quantum physics!
Figuring out the answer involved a prism, a pail of water, and a 50 year effort by the most famous father-son astronomer duo ever.
Some say that the Sun is a green-yellow color, but our human eyes see it as white, or yellow-to-red during sunset. What color is it really?
The cosmic scales governing the Universe are almost unbelievably large. What if we shrunk the Sun down to be just a grain of sand?
For now, our Solar System's eight planets are all safe, and relatively stable. Billions of years from now, everything will be different.
2023 is an exciting time for the study of quark-gluon plasmas.
It could prevent sun damage and help chemical burns heal faster.
Across all wavelengths of light, the Sun is brighter than the Moon. Until we went to the highest energies and saw a gamma-ray surprise.
Even if you aren't in the path of totality, you can still use the solar eclipse to measure how long it takes the Moon to orbit Earth.
No matter how you define the end, including the demise of humanity, all life, or even the planet itself, our ultimate destruction awaits.
An annular eclipse is coming to Earth on October 14, 2023. Six months later, a total solar eclipse is headed our way. Here's the reason why.
The least exciting of all eclipses, a penumbral lunar eclipse, foreshadows the spectacular show that April 8th's total eclipse will bring.
With a telescope at just the right distance from the Sun, we could use its gravity to enhance and magnify a potentially inhabited planet.
On Saturday, October 14, a solar eclipse crosses North and South America. Here are 4 quick, easy, low-tech activities for everyone to enjoy!
Sun-like stars live for around 10 billion years, but our Universe is only 13.8 billion years old. So what's the maximum lifetime for a star?
Most of us have heard that the Sun is an ordinary, typical, unremarkable star. But science shows we're actually anything but average.
The Earth that exists today wasn't formed simultaneously with the Sun and the other planets. In some ways, we're quite a latecomer.
Though Sun Tzu’s "The Art of War" is a classic military treatise, its advice applies to all manner of conflict.
For thousands of years, humanity had no idea how far away the stars were. In the 1600s, Newton, Huygens, and Hooke all claimed to get there.
There are only a precious few minutes of totality during even the best solar eclipses. Don't waste yours making these avoidable mistakes.
Thanks to observations of gravitational waves, scientists were able to settle a longstanding debate over the speed of gravity.
In the early stages of our Solar System, there were three life-friendly planets: Venus, Earth, and Mars. Only Earth thrived. Here's why.
Here on Earth, the Sun is our primary source of light, heat, and energy. But it also poses a grave threat to human civilization.
The first stars took tens or even hundreds of millions of years to form, and then died in the cosmic blink of an eye. Here's how.
Recasting the iconic Carrington Event as just one of many superstorms in Earth’s past, scientists reveal the potential for even more massive eruptions from the sun.
Before Constantine received his history-defining vision, a pagan Sun god paved the way for Jesus Christ’s triumphal entry into the Eternal City.
Massive objects like black holes, stars, and rogue planets routinely pass near our Solar System. An ensuing comet storm could destroy us.
In our Solar System, even the two brightest planets frequently align in our skies. But only rarely is it spectacularly visible from Earth.