Astronomers before Eddy had also named the period after the solar astronomer Edward W. Maunder ( 1851 – 1928 ) who studied how sunspot latitudes changed with time.

Astronomers who had been studying the planet Venus chose Rittenhouse to study the transit path of Venus in 1769 and its atmosphere.

Astronomers such as Eudoxus ( contemporary with Plato ) observed planetary motions and cycles, and created a geocentric cosmological model that would be accepted by Aristotle – this model generally lasted until Ptolemy, who added epicycles to explain the retrograde motion of Mars.

* Leo Scanlon, American amateur astronomer who co-founded the Amateur Astronomers Association of Pittsburgh in 1929 and for whom 8131 Scanlon is named

Astronomers had believed for some time that parallax would provide the first accurate measurement of interstellar distances — in fact, in the 1830s there was a fierce competition between astronomers to be the first to measure a stellar parallax accurately.

Astronomers have long believed that the Magellanic Clouds have orbited the Milky Way at approximately their current distances, but evidence suggests that it is rare for them to come as close to the Milky Way as they are now.

Astronomers have dubbed this object as the Twin Jet Nebula because of the polar jets believed to cause the shape of the lobes.

Astronomers at that time believed in the Kant-Laplace hypothesis, which stated that the farthest planets from the sun are the oldest — therefore Mars was more likely to have advanced civilizations than Venus.

Astronomers of his time believed the universe to be heliocentric, a belief they held until the 1920s.

Astronomers originally supposed that the entire trans-Neptunian population would show a similar red surface colour, as they were believed to have originated in the same region and subjected to the same physical processes.

Astronomers typically use gigaparsecs to measure large-scale structures such as the size of, and distance to, the CfA2 Great Wall ; the distances between galaxy clusters ; and the distance to quasars.

Astronomers considered many distinct classes of objects, including white dwarfs, pulsars, supernovae, globular clusters, quasars, Seyfert galaxies, and BL Lac objects.

Astronomers using the Hale Telescope have discovered distant objects at the edges of the known universe called quasars and have given us the first direct evidence of stars in distant galaxies.

Astronomers made over 104, 000 observations using the IUE, of objects ranging from solar system bodies to distant quasars.

Astronomers were surprised by these " hot Jupiters ," since theories of planetary formation had indicated that giant planets should only form at large distances from stars.

Astronomers fell into the habit of referring to them and Titan as Saturn I through Saturn V. Once Mimas and Enceladus were discovered, in 1789, the numbering scheme was extended to Saturn VII.

Astronomers first began to suspect that the Milky Way is a barred spiral galaxy in the 1990s .< ref > Their suspicions were confirmed by the Spitzer Space Telescope observations in 2005 which showed the galaxy's central bar to be larger than previously suspected.

Astronomers were able to discover that IRS2 is in fact a twin system composed of two almost equally massive stars.

Astronomers often talk about " good " nights with a low average seeing disc diameter, and " bad " nights where the seeing diameter was so high that all observations were worthless.

Astronomers were able to distinguish the warmest parts of the gas heated by the violent shocks and found that they form a complex double-bubble shape.

Astronomers were surprised at this as the Moon is the only large object in orbit around the Earth and anything else would have been ejected long ago due to perturbations with the Earth, the Moon and the Sun.

Astronomers were then sent their data on magnetic tape by post, about a week after processing.

As a result of appointments of Government Astronomers in Sydney and Melbourne there were far more precise values for the longitudes of these places and hence the 141st longitude of the legal border.

Astronomers did not observe large amounts of water following the collisions, and later impact studies found that fragmentation and destruction of the cometary fragments in an ' airburst ' probably occurred at much higher altitudes than previously expected, with even the largest fragments being destroyed when the pressure reached, well above the expected depth of the water layer.

Astronomers detected what appeared to be a faint blue star at the location of the radio source and obtained its spectrum.

Astronomers at the Joint Astronomy Centre in Hawaii and at UCLA suggested that the image may indicate a planetary system still undergoing formation.

Astronomers are now able to observe the comet at any point in its orbit.

Astronomers think the collision between Earth and Theia happened at approximately 4. 53 Gya ; about 30-50 million years after the Solar System began to form.

* 2002 — Astronomers at the Max Planck Institute for Extraterrestrial Physics present evidence for the hypothesis that Sagittarius A * is a supermassive black hole at the center of the Milky Way galaxy

Astronomers and scientists did not make any effort to detect this background radiation at that time, due to both a lack of interest and the immaturity of microwave observation.

Astronomers categorize it as a main-sequence star of spectral class K2, which means that energy generated at the core through nuclear fusion of hydrogen is emitted from the surface at a temperature of about 5, 000 K, giving the star an orange hue.

Astronomers at the Very Large Telescope site in Chile use adaptive optics.

Astronomers initially ruled out the possibility that some of the point-like objects are white dwarfs, because they are too blue to be consistent with theories of white dwarf evolution prevalent at the time.

Astronomers use many radio telescopes to look up at objects such as pulsars in our own Galaxy and at distant radio galaxies up to about half the distance of the observable sphere of our Universe.

Astronomers believe that centaurs are recent escapees from the Kuiper belt, a zone of small bodies orbiting in a cloud at the distant reaches of the solar system.

Astronomers need to be able to assign systematic designations to unambiguously identify all of these objects, and at the same time give names to the most interesting objects and, where relevant, features of those objects.

File: Astronomers Monument at Griffith Observatory. jpg | Astronomers Monument in front of north door.

Astronomers using the telescope discovered the first evidence for a supermassive black hole ( Sgr A *) at the centre of the Milky Way, and made the first optical observation of a gamma-ray burst.

Astronomers are confident that these observations of Sagittarius A * provide good empirical evidence that our own Milky Way galaxy has a supermassive black hole at its center, 26, 000 light-years from the Solar System because:

Astronomers announce this as evidence that the theory of the cosmological constant proposed, but later discarded, by Einstein may have been right after all.

Astronomers use the principle of parallax to measure distances to celestial objects including to the Moon, the Sun, and to stars beyond the Solar System.

Astronomers typically measure the distances between neighbouring galaxies and galaxy clusters in megaparsecs.

Astronomers usually express distances in units of parsecs ; light-years are used in popular media, but almost invariably values in light-years have been converted from numbers tabulated in parsecs in the original source.

Astronomers are interested in studying this galaxy as it can help in measuring extragalactic distances.