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...al telescopes) will be limited by the turbulent atmosphere, preventing the instruments from approaching the [[diffraction limit]]. ...elescopes| page=92|isbn=0-19-509019-5}}</ref> in terms of the so-called [[Astronomical seeing#The profile|atmospheric turbulence strength]] <math>C_n^2</math> (wh ...

== Low-band instruments == ...er, with a 100m cable run to a digital spectrometer.<ref name="MIT" /> The instruments operate at {{convert|50|–|100|MHz|m|abbr=on}}, and are separated by 150m. O ...

...hat is orbited by a planetary-mass object at a separation larger than 1000 astronomical units. All other systems with a separation >1000 au have a primary with <0. ...esearchers also found similarities with an archived [[Very Large Telescope#Instruments|SINFONI]] spectrum of the exoplanet [[2M1207b]] and spectra of the [[HR 879 ...

...mical Instruments in Holbein's "Ambassadors" |journal=Journal of the Royal Astronomical Society of Canada |volume=56 |page=45|bibcode=1962JRASC..56...45S }}</ref> ...

...ipoles (each). The field of view is large by the standard of astronomical instruments, being on the order of 30 degrees across.{{citation needed|date=August 2019 * [[List of astronomical observatories]] ...

...Parkes methanol multibeam survey |journal=Proceedings of the International Astronomical Union |volume=2 |issue=S237 |page=403 |conference=IAU Symposium #237: Star ...

|journal=[[Publications of the Astronomical Society of Japan]] ...essibility|compressible]], but could nevertheless be observed with imaging instruments as periodic standing or propagating displacements of coronal structures, e. ...

...>{{cite journal | last=de Kock | first=R. P. |journal=Monthly Notes of the Astronomical Society of South Africa | volume=7 | pages=74–75 | title=RR Tel. (195656) | ...<ref name=rob1975>{{cite journal | last=Robinson | first=E. L. | journal=[[Astronomical Journal]] | volume=80 | number=7 | pages=515 | title=Preeruption light curv ...

...trum]]. These filters have been used in FIR and submillimeter astronomical instruments for over 4 decades,<ref name=ade06> These filters have been used in FIR and submillimeter astronomical instruments for over 4 decades,<ref name = ade06 /> in which they serve two main purpos ...

...to the sensitive detector surface and characterized their composition. The instruments delivered radial profiles of their measured data. Comet or meteoroid stream ...ELIOS micrometeoroid experiments |journal=Journal of Physics E: Scientific Instruments |date=March 1973 |volume=6 |issue=3 |pages=209–217 |doi=10.1088/0022-3735/6 ...

...Amundsen–Scott South Pole Station]].<ref name="bicep_caltech" /> All three instruments have mapped the same part of the sky, around the [[south celestial pole]].< The institutions involved in the various instruments are [[Caltech]], [[Cardiff University]], [[University of Chicago]], [[Harva ...

..., this angle, though very slight, was within the theoretical capability of instruments of his day.<ref name="Sillitto">{{cite web|url=http://www.sillittopages.co. ...]] and estimates of the mass and density of the Earth. Since the masses of astronomical objects were known only in terms of relative ratios, the mass of the Earth ...

...on to the history of attempts to test the theory of relativity by means of astronomical observations |journal=Astronomische Nachrichten |date=1923 |volume=219 |iss ...Crocker Eclipse Expedition to Brovarý, Russia |journal=Publications of the Astronomical Society of the Pacific |date=1914 |volume=26 |issue=156 |pages=225–237|doi= ...

...asured the solar wind plasma environment with its [[FIELDS]] and [[SWEAP]] instruments.<ref name=NASA/> This event was described by NASA as "touching the Sun".<re ...ar wind structure and radio emission |journal=Monthly Notices of the Royal Astronomical Society |date=22 November 2018 |doi=10.1093/mnras/sty3132 |url=https://acad ...

...body]] of the [[Solar System]] – thus completing a full cycle of [[season|astronomical season]]s. For example, it is the time from [[March equinox|vernal equinox] The tropical year is one type of [[astronomical year]] and particular [[orbital period]]. Another type is the [[sidereal ye ...

...t the electronics of the rocket; Carlos Chagas Filho (IBCCF) developed the instruments for monitoring the cat's health; and astronomer Mário Ferreira Dias, from t ...bsp;kg, would contain an acrylic chamber for the cat, as well as the other instruments for the mission. The chamber, with the return speed estimated at 1,800&nbsp ...

.... "The Dark Ages Radio Explorer (DARE)." in the Bulletin of the [[American Astronomical Society]], vol. 43, p. 10709. 2011.</ref><ref> ...Ages and Cosmic Dawn remain beyond the observational reach of contemporary instruments.<ref name=nasadare/> ...

{{Short description|Astronomical problem concerning the age of the universe}} .... R. |title=Redshifts and magnitudes of extragalactic nebulae |journal=The Astronomical Journal |date=April 1956 |volume=61 |page=97 |doi=10.1086/107297|bibcode=19 ...

...artment=Central Bureau for Astronomical Telegrams |publisher=International Astronomical Union |date=24 September 2012 |id=Electronic Telegram No. 3258}}</ref> ...international observational project and in accordance with [[International Astronomical Union]] naming guidelines.<ref name=Cometography /><ref name=CSA-ISON-About ...

...ostatic pressures by a split sphere apparatus|journal=Review of Scientific Instruments|year=1970|volume=41|issue=8|pages=1178&ndash;1181|doi=10.1063/1.1684753|bib ...r BX90 diamond anvil cells with a range up to 1700 K. Review of Scientific Instruments, 92(1), p.013903. ...