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.
Are you aware of which star is the most radiant in the sky? Frankly speaking, this inquiry is quite fascinating. Because, to an observer on Earth, it appears as one celestial body, but in relation to the entire cosmos, it is an entirely different entity. The luminosity of stars is characterized by two stellar magnitudes:…
A star is considered variable if it has the ability to alter its brightness. This means that, from the perspective of an Earth observer, the star’s apparent magnitude undergoes periodic changes. These changes can occur over the course of years or even just seconds, and they can range from a difference of 1/1000th magnitude to…
Except for the Sun, which is native to Earth, all the stars appear as small bright dots in the dark night sky, located many light years away from us. As observers, their position in the sky constantly changes – they can rise above the horizon and disappear behind it. In the evening, they may be…
The lithosphere, which is composed of the upper part of the mantle and the Earth’s crust, serves as the solid shell of planet Earth. Comprising stable platforms and moving fold belts, the lithosphere provides complete coverage over the Earth’s surface, shielding it from the extreme temperatures emanating from the radiant Earth’s core. While the thickness…
Residents of the Northern Hemisphere of the Earth are fortunate – they can determine the north even without a compass or landmarks by knowing how to locate Polaris. Polaris always remains in one part of the sky and points north more accurately than any other instrument, making it a valuable tool for astronomers to navigate…
The current map of the Earth is no longer accurate. Africa is undergoing significant tectonic activity, causing it to crack along its seams. North America has shifted by half a meter, altering its geographical position. The Alps and Mount Everest are experiencing rapid growth, surpassing their previous heights. Additionally, a new island has emerged in…
The Sun, the central star of our solar system, is known for orbiting in various paths around which all the planets revolve. It has been around for approximately 5 billion years and is classified as a yellow dwarf, meaning it is relatively small in size. Unlike other stars, the Sun’s thermonuclear reactions occur at a…
A neutron star is a celestial body that formed through the process of stellar evolution and is primarily composed of a dense neutron core surrounded by a relatively thin crust (approximately 1 kilometer thick) made up of heavy atomic nuclei and electrons. The concept of neutron stars was first proposed by astronomers Walter Baade and…
The troposphere extends up to different altitudes depending on the latitude. In polar latitudes, its upper boundary is at an altitude of 8-10 km. In temperate latitudes, it reaches up to 10-12 km, and in tropical latitudes, it extends as high as 16-18 km. These altitudes may vary, being lower in winter and higher in…
The person who is credited with inventing the reflecting telescope is undoubtedly deserving of the highest admiration and profound appreciation from all contemporary astronomers. This groundbreaking invention ranks among the most momentous discoveries ever made. Thanks to the telescope, the study of the immediate cosmos became feasible, enabling the acquisition of invaluable knowledge about the…
Stellar Objects Sirius (α Canis Majoris, Alpha CMa, α CMa) is the most luminous star in the nocturnal sky. It is a binary star comprising of a primary star of spectral type A0 or A1 known as Sirius A and a dim white dwarf of spectral type DA2 referred to as Sirius B. The separation…
During the summer months, the night sky presents a mesmerizing display of stars. However, there are certain celestial formations that are best observed during the colder season. One such enchanting constellation is Orion. With a grand total of 209 stars that are visible to the naked eye, Orion stands out due to its abundant collection…
The Earth’s atmosphere is made up of a combination of various gases. The majority of the atmosphere is composed of nitrogen, accounting for 77 percent, while oxygen makes up an additional 21 percent. The remaining 2 percent consists of a mixture of trace gases such as argon, carbon dioxide, helium, neon, krypton, xenon, nitrous oxide,…
One light-year (sv. yr., ly) corresponds to the distance that light travels in the span of one year. More precisely, it represents the distance a photon can travel through a vacuum without any gravitational interference, within a single tropical year during the epoch 1900.0 (equivalent to 31,556,925.9747 SI seconds; also referred to as Ephemeris Time)….
In the late 16th century, there was a significant debate in astronomy between two models of our solar system: the geocentric model, originally proposed by Ptolemy, which stated that the Earth was the center of rotation for all celestial bodies, and the heliocentric model, introduced by Copernicus, which proposed that the Sun was the central…
Today, there is a wide range of telescopes to choose from, but not many are familiar with the concept of a Newtonian reflector – not only is it one of the most popular designs, but it also holds great historical significance. The Newtonian reflector played a crucial role in making some of the most important…
We are all familiar with the concept that space is something that exists outside of our planet, encompassing the entire universe. Essentially, space is an infinite expanse that extends in all directions, containing galaxies and stars, black holes and planets, as well as space debris and various other objects. The prevailing belief is that there…
Perhaps you’ve come across the saying: “When you gaze up at the heavens, you’re actually peering into the past. Many of the stars visible in the nighttime sky have long since faded away.” This deep philosophical notion serves as a way for individuals to come to terms with the reality that all things eventually come…
Scientists have been investigating the enormity of the solar system for centuries, observing the various categories of planets. With the discovery of exoplanets, our knowledge has expanded even further. In addition to gas giants, we have come across planets that resemble Earth. What exactly are these Earth-like planets? Defining Earth-like Planets An Earth-like planet is…
Approximately 5000 years ago, the night sky was illuminated by a dazzling disk, shining as brightly as our own Sun. The inhabitants of a nearby city were overcome with fear and rushed to the temples seeking refuge. The priests, using their divination skills, predicted impending misfortune and divine retribution that would befall the sinners unless…