August 7, 2023 - This limitation arises because the diffraction, or bending, of light as it passes through the aperture of a telescope causes a star to be observed as a bright disc (the Airy disc) with bright rings around it, rather than a point of light. A measurement of the optical power of lenses and curved mirrors in telescopes and binoculars. The dioptre is the reciprocal of the lens or mirror’s focal length in metres. This is the ability to adjust the power of the eyepieces on a pair of binoculars to suit your eyes. The Dobsonian telescope is a design of telescope that was lauded by the famous American astronomer Jon Dobson.

Translations are written by astronomers fluent in the chosen language and reviewed by astronomers and teachers fluent in that language. A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z ... The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO).

They are further classified according to their shape, as with regular-sized galaxies, and are often seen to orbit larger galaxies. Dwarf planet Dwarf planets are a category of solar system bodies created by the International Astronomical Union in 2006 to describe objects orbiting the Sun that are big and heavy enough to resemble a planet, but not big enough to 'clear' a free path on its orbit.

As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages. Click here to learn more. ... Click on an underlined word for more information on that subject. ... Click on an underlined word for more information on that subject. If the astronomy term you are looking for is not in the dictionary, please e-mail us.

This is why below, we have compiled a list of space words that start with D so you can learn more about the study of the universe.

So for example, you could enter "deimos" and click "filter", and it'd give you words that are related to space ... You can highlight the terms by the frequency with which they occur in the written English language using the menu below. The frequency data is extracted from the English Wikipedia corpus, and updated regularly.

20 hours ago - The term typically refers to very high-density objects such as white dwarfs, neutron stars, and black holes, or to stellar remnants with very small radii. ... See nuclear star cluster. ... A phenomenon during which two astronomical objects or spacecraft have either the same right ascension or the same ecliptic longitude as observed from a third body (usually the Earth), such that, from the observer's perspective, the objects appear to closely approach each other in the sky.

For your enjoyment and delight, we proudly present a list of space words and their definitions. And for extra convenience, they're even in alphabetical order!

Things in space with D - Darkness, Dark matter, Dirt, Dark, Drones, Dwarf planets, Death Star, dwarf planet, danger, Dead stars, Drone, Deimos + (89)

It is the substance that makes up physical objects. ... Planet closest to the Sun in our solar system. ... Also called a "shooting star," when a small piece of space debris enters Earth's atmosphere and burns up from the friction with the air molecules.

Only one usage of each socket address (protocol/network address/port) is normally permitted · Glossary Terms beginning with D

By default, the words are sorted by relevance/relatedness, but you can also get the most common space terms by using the menu below, and there's also the option to sort the words alphabetically so you can get space words starting with a particular letter. You can also filter the word list so it only shows words that ...

July 20, 2025 - Deep in the cosmos, space terms that start with D include dark matter — the invisible mass shaping galaxies, dwarf planets — like Pluto, and deep space — the vastness beyond our solar system. ... Along with space-terms Starting with D, Chirpy Pages have compiled a huge list of words, verbs, adjectives and nouns starting & ending with all letters of the alphabet.

Twinkl's Teaching Wiki gives explanations of common terms and key vocabulary used in teaching, and shows related Twinkl resources for each term.

August 18, 2009 - Explore our solar system and galaxies far, far away with our alphabetical astronomy word list!

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ScienceDirect provides coverage of all areas of Physics and Astronomy including Atomic, Molecular and Optical Physics, Astrophysics, Quantum Physics, Theoretical Physics and Nuclear and Particle Physics to help get you up to speed with new and unfamiliar concepts in your area of interest. Browse the Topics list or complete a keyword search to discover more.

December 23, 2023 - Dust – Minute particles floating in space. Dwarf galaxy – Small galaxy that contain a few million stars, it is the most common kind of galaxy in the universe. Dwarf star – A Smaller star. Any star of average to low brightness, mass, and size. ... Eccentric – Deviation from a circle, applied when describing the shape of an orbit. Eclipse – the total or partial blocking of one celestial body by another. Eclipsing binary – binary star with an orbital plane oriented so that one star passes in front of the other, thus completely or partially blocking the light from the other star during each orbital period.

So for example, you could enter "dwarf galaxy" and click "filter", and it'd give you words that are related to intergalactic space ... You can highlight the terms by the frequency with which they occur in the written English language using the menu below. The frequency data is extracted from the English Wikipedia corpus, and updated regularly.

May 28, 2025 - This is a partial list of named minor planets, containing all those starting with the letter D, as of 7 April 2025. It is ordered in a case-insensitive, alphabetical manner and contains a total of 1,190 entries. Grey minor planets have no article and redirect to the list of minor planets instead ...