Universe🌌
Asteroid and Comet Impacts
Historic collisions (like the one that ended dinosaurs) and ongoing threat assessment for Earth Cosmic Visitors and Impact Hazards Earth’s geological record and crater landscapes testify to the reality that...
Asteroid and Comet Impacts
Historic collisions (like the one that ended dinosaurs) and ongoing threat assessment for Earth Cosmic Visitors and Impact Hazards Earth’s geological record and crater landscapes testify to the reality that...
The Sun’s Structure and Life Cycle
Its current main-sequence phase, future red giant stage, and eventual white dwarf fate The Sun as Our Stellar Anchor The Sun is a G-type main-sequence star (often denoted G2V) at...
The Sun’s Structure and Life Cycle
Its current main-sequence phase, future red giant stage, and eventual white dwarf fate The Sun as Our Stellar Anchor The Sun is a G-type main-sequence star (often denoted G2V) at...
Earth’s Accretion and Differentiation
Earth’s Accretion and Differentiation From planetesimals to proto-Earth, and the separation into core, mantle, and crust 1. A Rocky Planet Emerges from Dust Over 4.5 billion years ago, the proto-Sun...
Earth’s Accretion and Differentiation
Earth’s Accretion and Differentiation From planetesimals to proto-Earth, and the separation into core, mantle, and crust 1. A Rocky Planet Emerges from Dust Over 4.5 billion years ago, the proto-Sun...
Nucleosynthesis: Elements Heavier than Iron
How supernovae and neutron star mergers forge the elements that enrich the cosmos—ultimately gifting gold and other precious metals to our planetary home Modern science confirms that cosmic alchemy is...
Nucleosynthesis: Elements Heavier than Iron
How supernovae and neutron star mergers forge the elements that enrich the cosmos—ultimately gifting gold and other precious metals to our planetary home Modern science confirms that cosmic alchemy is...
Current Debates and Outstanding Questions
Unanswered puzzles in cosmology: the true nature of inflation, dark matter, dark energy, and cosmic topology 1. Introduction: The Successes and Limits of ΛCDM Contemporary cosmology rests on the ΛCDM...
Current Debates and Outstanding Questions
Unanswered puzzles in cosmology: the true nature of inflation, dark matter, dark energy, and cosmic topology 1. Introduction: The Successes and Limits of ΛCDM Contemporary cosmology rests on the ΛCDM...
Anisotropies and Inhomogeneities
The distribution of matter and slight temperature differences that shape structure formation Cosmic Variations in a Nearly Uniform Universe Observations show our universe is extremely uniform on large scales, yet...
Anisotropies and Inhomogeneities
The distribution of matter and slight temperature differences that shape structure formation Cosmic Variations in a Nearly Uniform Universe Observations show our universe is extremely uniform on large scales, yet...