Телеграм канал «Outer Space 🚀»

How might extraterrestrial civilizations see Earth? To find out exactly what an outsider might see, scientists used about 10,000 images of our planet taken by NASA's DSCOVR satellite. Then they scaled down several times to simulate the distance of several light years. On the resulting image, they highlighted the parameters that most characterize the most prominent parts of the Earth. As a result, the image produced a two-dimensional map of the Earth's surface, reconstructed from light curve readings without any assumptions about its spectral properties.

Where does the color of the Northern Lights come from? The color of the aurora borealis is formed when solar wind particles hit the molecules of our air. ✔️The air is composed of nitrogen and oxygen. These molecules are excited and then instantly release the energy of the excitation in the form of radiation of a strictly defined wavelength. If to look at the spectrum of the aurora borealis, you will see that the brightest bands in the visible part of the spectrum are green and red (both belong to oxygen). The red glow is formed at altitudes above 200 km, where the density of gas is lower. And the green glow is formed closer to an altitude of 100 km, where the density of the gas is higher.

Astronauts eat not only from tubes Contrary to popular misconception, it is possible to eat fruit, berries and cakes in natural form in orbit. The official menu for astronauts consists of 250 items, and if a cargo ship goes to the ISS, they can order something fresh. Conventional salt and pepper are not available for astronauts: if they salt or pepper a dish in zero gravity, the spices will fly around and get in their eyes. Therefore, liquid salt solution and condiments are used - mustard and ketchup are especially popular.

What are Saturn's rings made of? The size of particles in Saturn's rings is from micrometers to centimeters. The composition of the main rings: water ice (about 99%) with admixtures of silicate dust. The thickness of the rings is extremely small compared to their width (from 7 to 80 thousand kilometers above Saturn's equator) and ranges from one kilometer to ten meters. The total mass of debris material in the ring system is estimated at 3 × 1019 kilograms.

The Abyss of Jupiter See that black spot on Jupiter? No one can yet give a definitive answer as to what it is. During a recent flyby of NASA's Juno robotic spacecraft near Jupiter, images were obtained of an unusually dark cloud that has been informally named "Abyss." The surrounding clouds show that Abyss is the center of the maelstrom. The dark details in Jupiter's atmosphere are deeper than the light details, so the Abyss may indeed be a deep hole, as evidenced by its appearance. The Abyss is surrounded by a complex of whirlwinds and swirling hurricanes, with tall light clouds on top.

Photos of Pluto 24 years apart The photo on the left was taken in 2018 by the New Horizons spacecraft less than 1 million km from the planet's surface. The photo on the right was taken in 1994 by the Hubble telescope, from a distance of 5.7 billion km.

A clear example of how planets move The time it takes the planets to make a complete revolution around the Sun is naturally different. Mercury, the closest to the star, has 88 Earth days. Our Earth completes the cycle in 365 days and 6 hours. And the largest planet in the solar system, Jupiter completes its rotation in 11.9 Earth years. And Pluto, the most distant planet from the Sun, has a revolution of 247.7 years.