Experience the wonders of space with our comprehensive astronomy website. From stunning images captured by telescopes to informative articles on celestial phenomena, join us as we unravel the mysteries of our vast universe.
2,500 years ago, the Greeks hypothesized that the Earth is not a flat disk. Aristotle later presented compelling evidence to support this theory. During the time of Homer and for many centuries afterwards, the Greeks held the belief that the Earth was flat, taking on the shape of a disk. Notably, Thales, Herodotus, Anaxagoras, and…
The position of luminaries in the sky or points on an imaginary celestial sphere is described using celestial coordinate systems in astronomy. The horizontal coordinates, also known as azimuth and altitude, are the angular quantities that define the position of objects on the celestial sphere. These spherical coordinate systems do not consider distance and vary…
Mercury is often regarded as one of the most enigmatic and least explored celestial bodies within our solar system. Its proximity to the Sun presents numerous challenges for scientists seeking to study and understand its unique characteristics. One of the primary obstacles is the extreme temperature that Mercury experiences, reaching up to a scorching 350…
In the vast expanse of the starry sky, numerous constellations can be observed. However, the question arises: what exactly is a constellation? Despite our familiarity with this term, its true meaning may not be clear to those who do not have an interest in astronomy. If one were to inquire about the definition of a…
The power of a star is generated through the process of thermonuclear fusion taking place in an immense and everlasting cosmic furnace suspended in the vastness of space. Stars give the impression of being eternal, existing for all time, but in reality, this is far from the truth…. A celestial body known as a star…
Polaris is widely recognized as one of the most prominent stars in the night sky. It comes second only to the Sun in terms of popularity and is undoubtedly the most renowned among the stars that can be observed at night. It is not surprising that many individuals perceive it as something extraordinary, assuming it…
Dolphin constellation is actually one of the smallest constellations in the northern hemisphere. It occupies only 189 square degrees, making it the 69th largest constellation. Its shape resembles that of a kite and it is surrounded by the neighboring constellations Fox, Little Horse, Aquarius, Eagle, Arrow, and Pegasus. Legend of the Dolphin Constellation As an…
Gravitational speed refers to the rate at which gravitational influences, perturbations, and waves propagate. In quantum theories of gravity, the velocity of gravity is understood as the speed at which gravitons, the smallest particles (quanta) of the gravitational field, travel. Gravitational speed within physical theories Within Newton’s theory of gravitation, the speed of gravity is…
A celestial coordinate system is utilized to determine the precise location of a celestial body. These systems, known as the ecliptic coordinate system or equatorial coordinate system, are constructed based on specific circles of the celestial sphere. In contrast, the geographic coordinate system is employed to determine coordinates on the Earth’s surface. Let’s explore each…
Constellations Scorpio is a constellation situated in the southern sky that depicts a scorpion. It is one of the zodiacal constellations, which were first documented by Ptolemy in the second century. The constellation Scorpio predates the Greeks and has a history that dates back 5000 years to ancient Babylon, where it was known as GIR-TAB…
The Erida (Eris) is a dwarf planet that is located beyond the orbit of Neptune. It was discovered in 2005 by a team of astronomers led by Michael Brown. Initially, it was thought to be a full-fledged planet similar to Pluto. However, the similarity between Erida and Pluto eventually led to the reclassification of Pluto…
The biggest planets in our solar system Our universe is the vast expanse that surrounds us. Space is not simply empty; it is brimming with a multitude of objects including stars, planets, nebulae, galaxies, black holes, pulsars, and quasars. What is visible to us is only a fraction of what is out there, thanks to…
The device and operation of different optical devices are based on the principles of geometrical optics. Let’s examine a few of them. An opaque camera and a lens system called a lens are the main components of a camera. The most basic lens is a single collecting lens. This lens forms a real inverted image…
The earliest documented observations of celestial phenomena. The ancient understanding of the cosmos. Examination of the historical development of theories about the structure of outer space, tracing their evolution from ancient times to the present. Methods used in astronomical observations. Rubric Astronomy and Astronautics View Abstract Language Russian Date of addition 28.03.2020 File size 48.1…
When embarking on a sea voyage, the fear of losing one’s way is a thing of the past. Thanks to cutting-edge technology such as GPS navigators, radar systems, and meticulously crafted maps, sailors can navigate through the vast ocean with ease. However, it is worth noting that throughout most of human history, mariners relied solely…
On September 15, 2017, the Cassini mission came to an end, marking a significant milestone in space exploration. The spacecraft deliberately entered Saturn’s atmosphere and disintegrated, ensuring that it would not pose a threat to any of Saturn’s satellites in the future. This precautionary measure was taken to prevent the potential contamination of Saturn’s moons…
The discovery of the first four satellites of Jupiter (Io, Europa, Ganymede, Callisto) took place in 1610. These satellites are commonly referred to as the Galilean satellites, in honor of Galileo. Two of these satellites are larger in size compared to the Moon, while the other two are slightly smaller. By the middle of the…
The length of the night is increasing and the duration of the day is decreasing as we move into October, following the autumnal equinox. As a result, the sunrise is becoming progressively later. Furthermore, October brings about a change in the constellations that are visible in the night sky, replacing those of the summer months….
According to the prevailing theory, approximately 14 billion years ago, the universe was devoid of any galaxies, stars, or planets. Instead, it consisted of an incredibly compact mass of incredibly hot plasma. This dense mass then underwent a massive expansion due to the event known as the Big Bang, which triggered a series of transformations…
Eridanus, a constellation situated in the southern hemisphere, is a prominent feature in the night sky. Despite its size, Eridanus is easily visible from various locations in Russia. Ranking sixth in terms of area among other constellations, Eridanus offers numerous captivating objects for astronomers to observe and study worldwide. Brief overview Eridanus constellation is ranked…