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...s are necessary. Periodic changes in brightness have long been observed in stars which indicate cooler or brighter [[starspot]]s on the surface. These spots ...t used to map chemical peculiarities on the surface of [[Ap and Bp star|Ap stars]]. For mapping starspots it was first used by [[Steven Vogt]] and Donald Pe ...

...ty-Centimeters''', or '''FIRST''', was an [[astronomical survey]] of the [[Northern Hemisphere]] carried out by the [[Karl G. Jansky Very Large Array|Very Larg ...ame="Becker1994" /> with regions centred on the North and South [[Galactic pole]]s. The regions were chosen so that they would also be covered by the [[Slo ...

...nimation of the [[Moon]] as it cycles through its phases, as seen from the Northern Hemisphere. The apparent wobbling of the Moon is known as [[libration]].]] ...same angular distance from the Sun, appearing to move with respect to the stars since the previous month. Consequently, at 27 days, 7 hours, 43 minutes and ...

...course of a [[year]], the Sun appears to move with respect to the [[fixed stars]] on the [[celestial sphere]], along a circular path called the [[ecliptic] ..., and the <math>Z</math> axis towards the [[Celestial pole|North celestial pole]].<ref> ...

| Design = A large golden star within an arc of four smaller golden stars, in the canton, on a field of [[Chinese red]]. ...g elements|canton]]. The design features one large star, with four smaller stars in an arc set off towards the fly. It has been the national flag of China s ...

...d since the 1980s by way of earth-based observation of [[occultation]]s of stars by Pluto<ref name=Elliot_2007/><ref name=Olkin_2015/> and [[Astronomical sp ...to >10&nbsp;km, and vertical distance between them is about 10&nbsp;km. In northern regions the haze is 2-3 times denser than near the equator.<ref name=Gladst ...

...:4" /> However, not all regions on Mars show such correlation, notably the northern lowland and the poles.<ref name=":4" /> Misleading results could be easily ...southern highland has high gravity/topography correlation but not for the northern lowland.<ref name=":4" /> Therefore, the resolution of free-air gravity ano ...

{{Short description|Study of the movement of stars}} ...barnard.html|title=Barnard's Star (V2500 Ophiuchi)|date=November 2005|work=Stars|publisher=James B. Kaler|access-date=12 July 2018|archive-url=https://web.a ...

...easured by a plumb line; the plumb line appears to point southwards on the northern hemisphere and northwards on the southern hemisphere. <math>\Omega\approx 7 ...if appropriate, based on a [[sidereal time|sidereal]] day relative to the stars (≈366.24 days/year) rather than on a [[solar time|solar]] day (≈365.24 days ...

.... If the outer ring is coplanar to Quaoar's equator (having the same north pole orientation), then Quaoar would have the same axial tilt with respect to th ...dim, 18.6-[[apparent magnitude|magnitude]] object slowly moving among the stars of the [[constellation]] [[Ophiuchus]].<ref name="FAQ-Quaoar"/><ref name="M ...

...by Li Kan (1244–1320); using evidence of fossilized bamboo found in a dry northern climate zone, [[Shen Kuo]] hypothesized that [[Climate change (general conc ...o was known only to grow in damp and humid conditions, the climate of this northern region must have been different in the very distant past, postulating that ...

...f the energy available to do work, must rise over time.<ref name="Nave" /> Stars will eventually exhaust their supply of [[hydrogen]] fuel via fusion and bu ...Cephei, aka Errai, a future North Star |url=https://earthsky.org/brightest-stars/gamma-cephei-errai-future-north-star/ |access-date=25 December 2021 |websit ...

...at least aware that the "star" he had observed had moved relative to fixed stars.<ref>{{cite web |title=Galileo discovered Neptune, new theory claims |first ...|author-link2=Thérèse Encrenaz |date=18 September 2007 |title=A Warm South Pole? Yes, On Neptune! |url=http://www.eso.org/public/news/eso0741/ |url-status= ...

Below there are lists the nearest stars separated by [[spectral type]]. The scope of the list is still restricted t == List of nearest M-type stars == ...

...on some of the major rivers; accounts of fictitious geography of the north pole and the southern continent. The full Latin texts and English translations o ...tp://www.maritiemdigitaal.nl/index.cfm?event=search.getdetail&id=100185289 Northern Asia]'' ...

...ny {{gli|air current}} moving away from either the North Pole or the South Pole.}} ...-pressure area|low pressure}}. Anticyclonic storms rotate clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere.}} ...

...lin |first=Bryce T. |date=13 December 2019 |title= Constraints on the spin-pole orientation, jet morphology, and rotation of interstellar comet 2I/Borisov As seen from Earth, the comet was in the northern sky from September until mid-November. It crossed the ecliptic plane on 26& ...

...lection of [[Russian folk songs]], adapted [[rammed earth]] technology for northern climate and built the [[Priory Palace]] in [[Gatchina]], pioneered [[HVAC]] *'''[[Sofia Kovalevskaya]]''', the first woman professor in Northern Europe and Russia, the first female professor of mathematics, discovered th ...

...)|Gaia]] telescope's second data release from April 2018, an estimated 694 stars will approach the Solar System to less than 5 [[parsec]]s in the next 15 mi ...entricity]], a low [[axial tilt]] (or obliquity), and the alignment of the northern hemisphere's [[summer solstice]] with the [[aphelion]]. Each of these effec ...

File:Gannet (Morus bassana), Belmont - geograph.org.uk - 529175.jpg|[[Northern gannet|Gannets]] [[plunge dive]] from above to catch forage fish ...m puffins to plankton: a DNA-based analysis of a seabird food chain in the northern Gulf of Maine". ''PLOS ONE'', '''8'''(12): e83152. {{doi|10.1371/journal.po ...