22 facts
When viewed from space, the Sun emits light across the entire visible spectrum, making it appear white. Its yellow appearance from Earth is due to atmospheric scattering, which removes blue light, making it seem warmer in color.
Also known as water bears, these microscopic invertebrates are virtually indestructible. They can endure extreme temperatures, dehydration, and even radiation levels thousands of times higher than humans, making them true extremophiles.
Due to the way Martian dust scatters light, the blue light penetrates the atmosphere more efficiently than other colors. This creates a striking blue hue around the setting sun, a stark contrast to Earth's familiar red sunsets.
While there's no air to transmit sound waves as we know them, space isn't a perfect vacuum. Planets, stars, and other celestial bodies emit electromagnetic vibrations that can be converted into sound, revealing a hidden symphony.
Known as Gaia BH1, it's located in the constellation Ophiuchus and is about 10 times the mass of our Sun. This discovery challenges previous assumptions about how many dormant black holes exist in our galaxy and their detectability.
According to Einstein's theory of general relativity, gravity causes time to slow down. Since there's slightly less gravitational pull at higher altitudes, time literally ticks faster compared to sea level, a measurable effect of spacetime curvature.
Scientists estimate there are between 100 billion and 400 billion stars in our Milky Way galaxy alone, and there are billions of galaxies in the observable universe. This vastly outnumbers the estimated 7.5 x 10^18 grains of sand on all Earth's beaches.
Scientists theorize that lightning storms convert methane into soot, which then hardens into graphite and eventually diamonds as it falls through the planets' dense atmospheres. These diamonds could be massive, up to a centimeter in diameter, creating truly sparkling storms.
In microgravity, tears don't fall due to the lack of gravity. Instead, they cling to the eye and form a watery ball, which can cause stinging and blurry vision, making crying an uncomfortable and difficult experience for astronauts.
PSR J1719-1438 b, a planet orbiting a pulsar, is believed to be a former star whose outer layers were stripped away, leaving a super-dense core of crystallized carbon. It's roughly five times the size of Earth, truly a cosmic jewel.