Astronomy is the science of everything beyond Earth’s atmosphere: the Moon, planets, stars, galaxies, and the universe as a whole. For beginners, the subject can be understood as a way of asking simple questions with careful tools: What is out there, how does it move, how did it form, and could life exist elsewhere? Modern…
The Solar System is the planetary system centered on the Sun, a middle-aged star whose gravity holds together planets, dwarf planets, moons, asteroids, comets, dust, and gas. It formed about 4.6 billion years ago from a collapsing cloud of gas and dust, and its present structure preserves a record of that early history. Studying it…
The search for hidden oceans beyond Earth has transformed our understanding of planetary science and astrobiology. Beneath layers of ice and thick atmospheres, several moons in our solar system harbor vast reservoirs of liquid water or other exotic fluids. These concealed seas represent some of the most promising locations for discovering extraterrestrial life. Recent missions…
The origin of Earth’s only natural satellite, the Moon, remains one of the most captivating puzzles in planetary science. Over decades of research, several hypotheses have emerged to explain its formation, each supported by different lines of geological, geochemical, and dynamical evidence. Understanding how the Moon formed offers insights not only into our planet’s early…
Astronomers have long been fascinated by the existence of planets that wander the Milky Way untethered to any host star. These mysterious rogue worlds drift through interstellar space, offering unique insights into planetary formation, dynamics, and the diversity of objects in our galaxy. Detecting such elusive bodies requires an arsenal of specialized techniques and instruments,…
The Voyager missions stand as some of the most ambitious and enduring endeavors in space exploration. Launched at the brink of the 1970s, these twin probes have journeyed farther than any other human-made spacecraft, revealing astonishing insights into our solar system and beyond. Their voyage continues to reshape our understanding of planetary science, the nature…
Europa, the enigmatic moon orbiting Jupiter, has captured the imagination of planetary scientists and the public alike. Beneath its bright, fractured exterior lies a global ocean that may harbor the conditions necessary for life. Crisscrossed by linear fractures and chaotic terrains, Europa’s surface hints at a dynamic interior powered by tidal interactions with its parent…
