Tag: science & technology

The Chandrasekhar Limit is approximately 1.4 solar masses (precisely about 1.44 in common references). When a white dwarf exceeds this mass, electron degeneracy pressure fails and gravitational collapse triggers a Type Ia supernova. This fundamental limit determines the fate of white dwarf stars.

The Hubble Space Telescope was launched on April 24, 1990, aboard Space Shuttle Discovery during mission STS-31. It was deployed into low Earth orbit the following day. Despite initial problems with its primary mirror, servicing missions have made it one of the most productive scientific instruments ever built.

The Andromeda Galaxy (M31) is the closest major galaxy to the Milky Way at approximately 2.5 million light-years. While dwarf galaxies like Canis Major are closer, among the options given, Andromeda is the correct answer. NGC 3377, Whirlpool, and M87 are all much more distant.

The universe has been continuously expanding since the Big Bang, as first demonstrated by Edwin Hubble's observations of galactic redshifts. This expansion is accelerating due to dark energy, causing galaxies to move away from each other at increasing rates, though gravity binds local structures together.

String theory requires 10 dimensions - 9 spatial dimensions plus 1 time dimension - to be mathematically consistent. We experience only 3 spatial dimensions in everyday life, while the remaining 6 dimensions are theorized to be compactified or curled up at extremely small scales beyond direct observation.

Riboflavin is the scientific name for Vitamin B2. Vitamin B1 is Thiamine, B3 is Niacin, and B5 is Pantothenic acid. The B-complex vitamins each have distinct chemical names that are important to know.

Calciferol is the correct chemical name for Vitamin D. Retinol is Vitamin A, and Pyridoxine is Vitamin B6. Vitamin D exists in two forms: D2 (ergocalciferol) and D3 (cholecalciferol), both classified as calciferols.

Vitamin B7, also known as biotin, was previously classified as Vitamin H. The vitamin naming system evolved over time, and many vitamins had multiple historical names before standardization.

Scurvy is caused by Vitamin C deficiency. It results in collagen synthesis problems, leading to bleeding gums, joint pain, and fatigue. Vitamin C (ascorbic acid) is essential for collagen production and antioxidant function.