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Why can’t we see stars in photos from space? 🤔 In photos from Earth orbit or the Moon, stars are not visible due to camera settings. Stars emit faint light compared to sunlit objects. Cameras are set to short exposure times and low sensitivity to avoid overexposing Earth, the Moon, or other bright objects. With such settings, it’s simply impossible to capture the dim light of the stars. If cameras were set specifically to capture the starry sky, the bright objects in the foreground would appear overexposed or blurry. 🛸 Deep Space

☀️ This is our star, with a surface temperature of ~5500° C Thanks to the Sun (and many other factors), life exists on Earth. We see beautiful sunrises and sunsets, can observe auroras and eclipses, as well as colorful atmospheric phenomena like halos, rainbows, noctilucent clouds, and much more! In these images, taken using a special narrowband H-alpha filter, we see sunspots, active regions, and filaments. All of these contribute to solar activity, which in turn generates auroras on our planet. 🛸 Deep Space

A decade of star observations around the black hole at the center of the Milky Way ⚫️ For 10 years, scientists observed the motion of stars around the supermassive black hole at the center of our galaxy. These stars move at tremendous speeds. The observations help study matter near the black hole and more accurately calculate its mass, which is about 4 million solar masses. Some of these stars, such as S2, orbit the black hole at speeds up to 25 million kilometers per hour. 🛸 Deep Space

Ceres once had an ancient frozen ocean 🌊 The dwarf planet Ceres, located in the Main Asteroid Belt, is of great interest to scientists studying the formation and evolution of such objects, as it’s the only dwarf planet that has been explored up close by a spacecraft. Thanks to NASA’s Dawn spacecraft, hydrated minerals were discovered on its surface, and combined with gravity data, this suggests the existence of a subsurface frozen ocean. Numerical models indicate a gradual decrease in ice content from 90% at the surface down to zero at a depth of 117 km. 🛸 Deep Space

Uranus’ rings in their hidden splendor In this composite image taken by the James Webb Space Telescope, we see one of the most distant and least-known planets of the Solar System — the remote ice giant Uranus. The telescope’s new capabilities have revealed fresh cosmic beauty — here, Uranus’ disk resembles a gemstone, and its ring system, once thought faint and scattered, is seen in full clarity. Nine of Uranus’ 27 moons are also visible. The universe not only sparks the imagination but also delights the eye. 🛸 Deep Space

It can get pretty cloudy on Mars too ☁️ 🛸 Deep Space

Visualization of Earth’s Ocean Currents Currents up to 600 meters deep are shown in white, while deeper waters appear in shades of blue. The visualization was created using a range of data sources: satellite observations, drifting buoys, and direct ocean measurements. The data was collected from 2021 to 2023. The animation begins with a global view and then gradually zooms in on three key currents: the Kuroshio Current, the Agulhas Current, and, of course, the famous Gulf Stream. 🛸 Deep Space

Stunning Panorama of the Starry Sky 😍 The bright Moon is visible on the left side of the sky, but then it darkens, as the timelapse was taken during a total lunar eclipse. The footage was shot in Uruguay. 🛸 Deep Space

Earth Might Have Stolen the Moon 🌕 A new study proposes an alternative theory of the Moon’s origin: it may have been captured by Earth rather than formed after a collision. The traditional theory suggests that the Moon formed as a result of a collision between the proto-Earth and a Mars-sized protoplanet. Some of the debris left from this catastrophe eventually formed our satellite. However, simulations show that if this were the case, the Moon should be orbiting over Earth’s equator. In reality, its orbit is tilted and aligns more closely with the position of the Sun than with Earth’s equator. This inconsistency has led scientists to explore other origin scenarios. According to the new alternative theory, the Moon may have originally orbited another massive celestial body—until Earth came close to that system and “snatched” the Moon, leaving it in orbit around our planet. The second object in the system may have been ejected from the Solar System due to gravitational interactions. 🛸 Deep Space

Webb Measures the Expansion Rate of the Universe 📏 The Hubble constant, which defines the rate at which the Universe is expanding, has long been a topic of scientific debate. Early studies of the cosmic microwave background predicted a speed of about 67 km/s per megaparsec, but more recent measurements based on observations of distant objects give a value of 73–74 km/s per megaparsec. Recent observations with the Webb telescope of the supernova SN H0pe have confirmed this rate, measuring 75.4 km/s per megaparsec with an acceptable margin of error. This further intensifies the discrepancy in results known as the “Hubble tension.” The farther apart galaxies are, the faster they move away from each other. That’s why the Hubble constant is expressed in km/s per megaparsec. For example, if two galaxies are 5 megaparsecs apart, their recession speed would be 377 km/s (75.4 × 5). One megaparsec equals 3.26 million light-years. 🛸 Deep Space