Epochs

Different astronomers or groups of astronomers used to define epochs to suit themselves, but in these days of speedy communications, the epochs are generally defined in an international agreement, so astronomers worldwide can collaborate more effectively.

Van Dokkum added, “WST was built to explore the earliest epochs of the formation of black holes and galaxies.

Cornell astronomers have created five models representing key points from our planet's evolution, like chemical snapshots through Earth's own geologic epochs.

People counted the years by the number of floods they’d lived through, their own watery epochs, and they’d even developed their own internal threat warning system: the old flagpole that stood like a roundabout in the middle of Main Street.

I mean sculptors who epitomize their epochs in three dimensions that acquire the fourth, of time, in the course of our fascination.

Igbo people are deeply religious and their names take root from the profound African philosophy and metaphysics of many epochs.

Jesus told them, “It is not for you to know times or epochs which the Father has fixed by His own authority,” but you are to “be My witnesses,” (Acts 1:7-8).

Based on this definition, the galactic poles and equator can be found from spherical trigonometry and can be precessed to other epochs ; see the table.

British geologists were also responsible for the grouping of periods into Eras and the subdivision of the Tertiary and Quaternary periods into epochs.

By dividing the Tertiary Period into two periods instead of directly into five epochs, the periods are more closely comparable to the duration of 'periods' in the Mesozoic and Paleozoic Eras.

Coordinates from different epochs must be mathematically rotated to match each other, or to match a standard epoch.

During past epochs, Oman was covered by ocean, witnessed by the large numbers of fossilized shells existing in areas of the desert away from the modern coastline.

During the accumulation of supercontinents with times of regional uplift, glacio-epochs seem to be rare with little supporting evidence.

Each of the local epochs is divided into several stages.

Epochs are generally chosen to be convenient or significant by a consensus of the time scale's initial users, or by authoritarian fiat.

First, compute the difference between satellites, then between receivers, and finally between epochs.

Fossil evidence of the Asterales is rare and belongs to rather recent epochs, so the precise estimation of the order's age is quite difficult.

Fossils and artifacts are "documents" of the epochs hypothesized.

Her career had traversed epochs where it was possible to say, "In the Sixties and early Seventies, there was no better known – or more scandalous – movie star on earth.

However, he was traditionally considered the "last Roman Emperor" by 18th and 19th century western scholars and his overthrow by Odoacer used as the marking point between historical epochs, and as such he is usually included in regnal lists.