Chrissy’s Reviews > Cosmos > Status Update
Chrissy
is on page 76 of 384
- Kelper allowed observation to correct his own beliefs and assumptions
- Tycho Brahe’s precise observations of Mars were key. A tiny discrepancy of eight arcminutes was enough to show Kelper that circular orbits were wrong
- Kepler discovered that planets move in elliptical orbits, change speed depending on how close they are to the sun, and follow a mathematical relationship between distance and orbital time
— 15 hours, 50 min ago
- Tycho Brahe’s precise observations of Mars were key. A tiny discrepancy of eight arcminutes was enough to show Kelper that circular orbits were wrong
- Kepler discovered that planets move in elliptical orbits, change speed depending on how close they are to the sun, and follow a mathematical relationship between distance and orbital time
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Chrissy’s Previous Updates
Chrissy
is on page 41 of 384
- The smallest known free living organisms are the PPLO (pleuropneumonia-like organisms). They are composed of about 50 million atoms.
- Even if life on another planet has the same molecular chemistry as life on Earth, there is no reason to expect it to resemble familiar organisms
— Sep 19, 2026 05:13PM
- Even if life on another planet has the same molecular chemistry as life on Earth, there is no reason to expect it to resemble familiar organisms
Chrissy
is on page 31 of 384
- All life on Earth shares a common evolutionary ancestry
- The artificial selection of Heike crabs resembling samurai warriors are an example of evolution through natural selection
- Well-adapted organisms are the result of enormous amounts of evolutionary filtering
- How did the universe go from non-living matter to living organisms? Sagan believes life can arise naturally from chemistry under the right conditions
— Sep 16, 2026 04:52AM
- The artificial selection of Heike crabs resembling samurai warriors are an example of evolution through natural selection
- Well-adapted organisms are the result of enormous amounts of evolutionary filtering
- How did the universe go from non-living matter to living organisms? Sagan believes life can arise naturally from chemistry under the right conditions
Chrissy
is on page 17 of 384
- Humanity stands at the "shore" of a vast cosmic ocean
- Eratosthenes, head of the Library of Alexandria, calculated the Earth’s size over 2,000 years ago using shadows, distance and geometry
- Ancient Alexandria shows how scientific understanding grew through questioning assumptions about the natural world
- Curiosity and exploration drive us to look beyond what we already know, and understand how we fit into it
— Sep 15, 2026 04:00AM
- Eratosthenes, head of the Library of Alexandria, calculated the Earth’s size over 2,000 years ago using shadows, distance and geometry
- Ancient Alexandria shows how scientific understanding grew through questioning assumptions about the natural world
- Curiosity and exploration drive us to look beyond what we already know, and understand how we fit into it