Blog

Learn how stars form from cold molecular clouds, what triggers collapse, and why only some clumps become shining stars.

Discover which planet is coldest, why it is colder than the outer giants, and how scientists measure extreme planetary temperatures.

Learn how scientists compare planets using mass, size, atmosphere, composition, orbit, and habitability clues across our solar system and beyond.

Explore how stars form inside cold molecular clouds, from gravitational collapse to protostars, nuclear ignition, and the factors that shape stellar mass.

Explore why some planets have rings, how they form, and why Saturn’s famous system is only part of a broader planetary story.

Explore the planet-wide systems that make Earth habitable, from its atmosphere and water cycle to plate tectonics, magnetic field, and climate stability.

Learn how stars form in nebulae, from gravitational collapse and protostars to disks, jets, and ignition in stellar cores.

Learn how stars get their names, from ancient traditions and Arabic astronomy to Bayer designations, Flamsteed numbers, and modern catalog systems.

Learn how astronomers measure stars using parallax, brightness, spectra, and more to estimate distance, size, mass, and temperature.

Explore the atmospheric and orbital forces that make Venus hotter than Mercury, despite being farther from the Sun.