While the Sun doesn't have a literal voice to speak, it produces audible sounds through vibrations, magnetic fields, and plasma waves, which scientists convert into audio using sonification, revealing a symphony of hisses, chirps, and hums from solar wind, flares, and its internal "heartbeat". These sounds are vibrations of electric and magnetic fields, translated from data captured by probes, allowing us to "hear" the Sun's dynamic activity like eruptions and solar wind.
Metcalfe, the paper's lead author and an astronomer at the Space Science Institute in Boulder, Colorado, says the Sun has likely already entered into a new, unpredicted, long-term, more quiescent phase of its evolution. This relatively quiet phase would play out over several hundred million years, says Metcalfe.
Orbit and Rotation
The Sun orbits the center of the Milky Way, bringing with it the planets, asteroids, comets, and other objects in our solar system. Our solar system is moving with an average velocity of 450,000 miles per hour (720,000 kilometers per hour).
While space remains dead silent to our ears, it buzzes with electromagnetic activity that can be translated into mesmerizing soundscapes by scientists. These sonified signals give us a way to “hear” the cosmos and understand celestial environments in ways we never imagined.
Astronomers estimate that the sun has about 7 billion to 8 billion years left before it turns into a white dwarf. One way or another, humanity may well be long gone by then.
All acronyms represent different names for associate degrees. AA stands for Associate of Arts, AS stands for Associate of Science, and AAS stands for Associate of Applied Science.
Hydrogen and helium together make up 98% of the mass of the Sun, whose composition is much more characteristic of the universe at large than is the composition of Earth.
Our Sun is a star, like the hundreds that you see at night, only much, much closer. The Sun is a huge ball of hot, churning, unpredictable supercharged gasses called plasma. Held together by gravity, the Sun produces the light and heat that make life on our planet possible.
It's a huge circle, and the speed with which the Sun has to move is an astounding 483,000 miles per hour (792,000 km/hr)! The Earth, anchored to the Sun by gravity, follows along at the same fantastic speed.
Yes, when you look at the Sun, you see it as it was about 8 minutes ago because light travels at a finite speed, taking roughly 8.3 minutes to cover the distance from the Sun to Earth, acting like a cosmic time machine, showing us the past of all celestial objects. This means if the Sun vanished, we wouldn't know for 8 minutes, and it also applies to everything else in space, with farther objects showing us even older history.
☀️ The Sun's Heartbeat: The 11-Year Solar Cycle Did you know our Sun has a “heartbeat”? It's called the solar cycle, and it lasts about 11 years. During this cycle, the Sun's magnetic field flips, and its activity levels swing between a minimum and a maximum.
A new NASA study shows that the Sun has been waking up from a period of low activity. Solar activity is known to fluctuate in cycles of 11 years, but there are also longer-term variations that can last decades. Our Sun's activity steadily decreased from the 1980s until 2008.
Although it's a star – and our local star at that – our sun doesn't have a generally accepted and unique proper name in English. We English speakers always just call it the sun. You sometimes hear English-speakers use the name Sol for our sun.
The sun is expected to churn out more eruptions in 2026 that could lead to geomagnetic storms here on Earth, giving rise to stunning auroras. Solar action should start to ease, however, with the 11-year solar cycle finally on the downslide.
The slow death will kill off life on Earth, but it may also create habitable worlds in what's currently the coldest reaches of the solar system. Any humans left around might find refuge on Pluto and other distant dwarf planets out in the Kuiper Belt, a region past Neptune packed with icy space rocks.
Clocks may have to skip a second — called a "negative leap second" — around 2029, a study in the journal Nature said Wednesday. "This is an unprecedented situation and a big deal," said study lead author Duncan Agnew, a geophysicist at the Scripps Institution of Oceanography at the University of California, San Diego.
The solar system as we know it began life as a vast, swirling cloud of gas and dust, twisting through the universe without direction or form. About 4.6 billion years ago, this gigantic cloud was transformed into our Sun.
Unfortunately, the answer is "not very long at all." Within just 10 to 15 seconds, a person in space without a spacesuit would fall unconscious due to a lack of oxygen. Even if they held their breath, their lungs would expand and rupture before their blood and other bodily fluids began to boil, causing massive damage.
When she brought her samples back in from the airlock, there was a rush of smell, the metallic aroma of space. "That was my favourite experiment – because it smelled." Other astronauts have described a smell akin to charred meat, gunpowder, or burnt electrical wiring.
About 95% of the universe is "invisible" because it's composed of dark matter (around 27%) and dark energy (around 68%), which don't emit, absorb, or reflect light, unlike the normal matter (stars, planets, us) that makes up the visible 5%. Dark matter's presence is inferred through its gravitational pull on visible galaxies, while dark energy is a mysterious force causing the universe's accelerated expansion.