Longest-lasting stellar eclipse discovered
Imagine living on a world where, every 69 years, the sun disappears in a near-total eclipse that lasts for three and a half years.
Imagine living on a world where, every 69 years, the sun disappears in a near-total eclipse that lasts for three and a half years.
Astronomy
Feb 18, 2016
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1613
(PhysOrg.com) -- Scientists have captured a 'terrifying' image of a giant Goliath-like star undergoing a two year eclipse. First discovered by a German astronomer 180 years ago, it is the first close-up image of an eclipse ...
Astronomy
Apr 7, 2010
10
0
Every motor we use needs a magnet. University of Manitoba researcher Rachel Nickel is studying how rust could make those magnets cheaper and easier to produce.
Nanophysics
Oct 5, 2023
3
39
Astronomers searching for Earth-like planets in other solar systems have made a breakthrough by taking a closer look at the surface of stars.
Astronomy
Oct 26, 2021
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271
Although out of sight to the majority of end users, data centers work behind the scenes to run the internet, businesses, research institutions and more. These data centers depend on high-capacity digital storage, the demand ...
Materials Science
Oct 8, 2020
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183
World energy consumption projections predict that coal will remain one of the world's main energy sources in coming decades, and a growing share of it will be used in CTL, the conversion of coal to liquid fuels. Researchers ...
Materials Science
Oct 12, 2018
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482
Under extremely high pressure conditions oxygen molecules group into quartets and give rise to a 'dance of their magnetic moments.' This, as observed in a new study carried out by SISSA in collaboration with ICTP and published ...
General Physics
Jul 7, 2014
4
1
(Phys.org) —New analysis of ancient Jian wares reveals the distinctive pottery contains an unexpected and highly unusual form of iron oxide. This rare compound, called epsilon-phase iron oxide, was only recently discovered ...
Materials Science
May 15, 2014
0
1
For the first time, researchers at Umeå University have succeeded in showing how the DNA polymerase epsilon enzyme builds new genomes. The detailed image produced by these researchers shows how mutations that can contribute ...
Biotechnology
Dec 2, 2013
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0
Japan's new solid-fuel rocket successfully blasted off Saturday carrying a telescope for remote observation of planets in a launch coordinated from a laptop computer-based command centre.
Space Exploration
Sep 14, 2013
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0
Epsilon (uppercase Ε, lowercase ε or lunate ϵ; Greek: Έψιλον) is the fifth letter of the Greek alphabet, corresponding phonetically to a close-mid front unrounded vowel /e/. In the system of Greek numerals it has a value of 5. It was derived from the Phoenician letter He . Letters that arose from Epsilon include the Roman E and Cyrillic Ye.
The name "epsilon" (ἒ ψιλόν, "simple e") was coined in the Middle Ages to distinguish the letter from the digraph αι, a former diphthong that had come to be pronounced the same as epsilon.
The uppercase form of epsilon looks essentially identical to Latin E. The lowercase version has two typographical variants, both inherited from medieval Greek handwriting. One, the most common in modern typography and inherited from medieval minuscule, looks like an inverted "3". The other, also known as lunate or uncial epsilon and inherited from earlier uncial writing, looks like a semicircle crossed by a horizontal bar. While in normal typography these are just alternate font variants, they may have different meanings as mathematical symbols. Computer systems therefore offer distinct encodings for them. In Unicode, the character U+03F5 "Greek lunate epsilon symbol" (ϵ) is provided specifically for the lunate form. In TeX, \epsilon () denotes the lunate form, while \varepsilon () denotes the inverted-3 form.
There is also a Latin epsilon or "open e", which looks similar to the Greek lowercase epsilon. It is encoded in Unicode as U+025B ("Latin small letter open e", ɛ) and U+0190 ("Latin capital letter open e", Ɛ) and is used as an IPA phonetic symbol. The lunate or uncial epsilon has also provided inspiration for the euro sign (€).
The lunate epsilon (ϵ) is not to be confused with the set membership symbol (∈), nor should the Latin uppercase epsilon (Ɛ) be confused with the Greek uppercase sigma (Σ).
This text uses material from Wikipedia, licensed under CC BY-SA