Galaxies
A comprehensive list of names for celestial objects
Explore how astronomers use astronymics and cosmonymics to name stars, planets, and galaxies according to strict IAU protocols.
Galaxies
The Milky Way, Andromeda, nebulae and the scale of the universe.
Galaxies
Methods for measuring the mass of celestial bodies
Explore how astronomers use orbital mechanics, binary star systems, and spectral broadening to calculate the mass of planets, stars, and galaxies.
Galaxies
Exploring the science of cosmology and the universe
Discover how modern cosmology explains the Big Bang, dark energy, and the evolution of our universe from its 13.8 billion year history to its eventual fate.
Galaxies
The study of celestial objects: Astronomy and its foundations
Explore the scientific discipline of astronomy, from historical observations and telescope types to specialized branches like astrophysics and cosmology.
Galaxies
What is the shape of our galaxy in a nutshell?
Discover the structure of the Milky Way, from its barred spiral disk and central bulge to its massive 1-million-light-year gravitosphere.
Galaxies
What is the study of celestial objects and phenomena called?
Learn about astronomy, the scientific study of celestial bodies, their physical properties, and the various branches used to explore the universe.
Galaxies
What the view of our galaxy is like when observed from space
Discover the Milky Way's structure, from its central bar and supermassive black hole to the massive dark matter halo that holds the spiral disk together.
Galaxies
When the inaugural satellite embarked on its journey through the
Discover the history of Sputnik-1, the first artificial satellite launched in 1957 that initiated the space age and changed scientific understanding of the atmosphere.
Galaxies
Where is the Earth located in the Milky Way galaxy?
Discover our precise location within the Orion Arm and learn how the Milky Way's structure influences the stability of our solar system.
Galaxies
Which category of galaxy does the Andromeda Nebula fall under?
Discover the morphological classification of the Andromeda Galaxy, its Sb spiral structure, and its complex stellar composition within the Local Group.
Galaxies
Methods for measuring the distance to celestial bodies
Explore the cosmic distance ladder, from trigonometric parallax and radar ranging to standard candles like Cepheid variables and Type Ia supernovae.
Galaxies
Where to find the Milky Way in Russia
Discover the best locations for stargazing in Russia, from the Arkhyz Caucasus mountains to the remote Chuyskaya Steppe and Lake Baikal.