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2 hours ago · History Early history. The hypothesis of dark matter has an elaborate history. In the appendices of the book Baltimore lectures on molecular dynamics and the wave theory of light where the main text was based on a series of lectures given in 1884, Lord Kelvin discussed the potential number of stars around the Sun from the observed velocity dispersion of the stars near the Sun, assuming that ...
1 day ago · In 2023, a Science paper estimated that at 1.5 °C (2.7 °F), one quarter of mountain glacier mass would be lost by 2100 and nearly half would be lost at 4 °C (7.2 °F), contributing ~ 9 cm (3 + 1 ⁄ 2 in) and ~15 cm (6 in) to sea level rise, respectively. Glacier mass is disproportionately concentrated in the most resilient glaciers.
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2 hours ago · v. t. e. The cosmic microwave background ( CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an important source of data on the primordial universe. [1] With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
1 day ago · A landslide is defined as the movement of a mass of rock, debris, or earth down a slope. Landslides are a type of " mass wasting ," which denotes any down-slope movement of soil and rock under the direct influence of gravity. Landslides occur mainly in mountainous terrains where there are conducive conditions of soil, rock, geology and slope.
2 hours ago · The Sputnik 1 became the first artificial Earth satellite on 4 October 1957. The satellite transmitted a radio signal, but had no sensors otherwise. Studying the Sputnik 1 allowed scientists to calculate the drag from the upper atmosphere by measuring position and speed of the satellite.
2 hours ago · The nearest giant star to the Earth. Spica (α Virginis A) 7.47 ± 0.54: One of the nearest supernova candidates and the sixteenth-brightest star in the night sky. Regulus A (α Leonis) 4.35 ± 0.1: The nearest B-type star to the Earth. Vega (α Lyrae) 2.726 ± 0.006 × 2.418 ± 0.012: Fifth brightest star in the night sky. Sirius A (α Canis ...
1 day ago · Whoever wins the general election, one potential headache for the new administration will be Thames Water. The current government has already drawn up contingency plans, known as Project Timber ...
