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From today's featured article The Virgo interferometer is a large-scale scientific instrument near Pisa , Italy, for detecting gravitational waves . The detector measures minuscule length variations in its two 3-kilometre (1.9-mile) arms induced by the passage of gravitational waves.
Earth's rotation axis moves with respect to the fixed stars (inertial space); the components of this motion are precession and nutation. It also moves with respect to Earth's crust; this is called polar motion. Precession is a rotation of Earth's rotation axis, caused primarily by external torques from the gravity of the Sun, Moon and other bodies.
The Purdue Spatial Visualization Test-Visualization of Rotations (PSVT:R) is a test of spatial visualization ability published by Roland B. Guay in 1977. [1] Many modifications of the test exist. The test consists of thirty questions of increasing difficulty, the standard time limit is 20 minutes.
The Ethiopian National Educational Assessment and Examination Agency (Amharic: የሀገር አቀፍ የትምህርት ምዘናና ፈተናዎች ኤጀንሲ; NEAEA) is a government agency responsible for conducting and inspection of national learning process of grade 4th and 8th since 2000, and grade 8th and 12th since 2010. [1]
The Ethiopian General Secondary Education Certificate Examination (EGSECE) is a nationwide exam in Ethiopia that is given to students after final year of secondary school education. [1] Students take EGSECE usually that would eligible to continue eleventh grade or college in preparatory schools. Since 2001, the Ethiopian Secondary Education ...
Spillover of the Ethiopian civil war. Djiboutian armed forces execute a drone strike near the Ethiopian border, killing eight members of what the government described as a "terrorist group" involved in "hostile actions". The attack also injured an unknown number of civilians.
Mathematics is often associated with astrology in traditional Ethiopia. [5] Ethiopian astrology, known as hasabe kewakibit, is part of bahire hasab, which is known as Ethiopian astrology and computus (church calendar). According to expert Yared Fenta, there are 28 stars for the 28 days, and 91 stars in one season that are dominant groups than ...
The Central Ethiopia Regional State is a regional state in Ethiopia. [1] It was formed from northern part of the then Southern Nations, Nationalities, and Peoples' Region (SNNPR) on 19 August 2023. Its formation was effected when South Ethiopia Regional State was established after a successful referendum from the former SNNPR .