For the word of God is living and powerful, and sharper than any two-edged sword, piercing even to the division of soul and spirit, and of joints and marrow, and is a discerner of the thoughts and intents of the heart.
(Hebrews 4:12) NKJV
Tags are only as useful as we make them. Since we started blogging in October 2015 we’ve been tagging posts on the physics of space and related subject matter as both #astronomy and #cosmology. That has the effect of making both tags meaningless.
Here’s what we’re going to do instead: We’re going to make a distinction between #astronomy and #cosmology and use this to help us organize our posts. Here are the definition which we’ll be working towards adhering to.
Astronomy (from Greek: ἀστρονομία) is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, and comets. Relevant phenomena include supernova explosions, gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave background radiation. More generally, astronomy studies everything that originates outside Earth’s atmosphere. Cosmology is a branch of astronomy. It studies the Universe as a whole.
– Astronomy, definition (Wikipedia)
Cosmology (from the Greek κόσμος, kosmos “world” and -λογία, -logia “study of”) is a branch of astronomy concerned with the studies of the origin and evolution of the universe, from the Big Bang to today and on into the future. It is the scientific study of the origin, evolution, and eventual fate of the universe. Physical cosmology is the scientific study of the universe’s origin, its large-scale structures and dynamics, and its ultimate fate, as well as the laws of science that govern these areas.
The term cosmology was first used in English in 1656 in Thomas Blount’s Glossographia, and in 1731 taken up in Latin by German philosopher Christian Wolff, in Cosmologia Generalis.
– Cosmology, definition (Wikipedia)
Matty (Headwind) 