| 1 |
Aperture |
3,841 |
 |
| 2 |
Spectroscopy |
3,520 |
 |
| 3 |
Lunar phase |
3,436 |
 |
| 4 |
Apparent magnitude |
2,189 |
 |
| 5 |
Light pollution |
1,407 |
 |
| 6 |
Sky |
1,395 |
 |
| 7 |
Interferometry |
1,198 |
 |
| 8 |
Compton scattering |
1,108 |
 |
| 9 |
Absolute magnitude |
977 |
 |
| 10 |
Naked eye |
660 |
 |
| 11 |
Collimated light |
592 |
 |
| 12 |
Radio astronomy |
519 |
 |
| 13 |
Third-party evidence for Apollo Moon landings |
479 |
 |
| 14 |
Occultation |
452 |
 |
| 15 |
Space observatory |
449 |
 |
| 16 |
Sun path |
319 |
 |
| 17 |
Night sky |
280 |
 |
| 18 |
Deep sky object |
269 |
 |
| 19 |
Opposition (planets) |
243 |
 |
| 20 |
X-ray astronomy |
242 |
 |
| 21 |
Infrared astronomy |
230 |
 |
| 22 |
Magnitude (astronomy) |
219 |
 |
| 23 |
Astronomical seeing |
197 |
 |
| 24 |
Astronomical interferometer |
188 |
 |
| 25 |
Astronomy on Mars |
182 |
 |
| 26 |
Sloan Digital Sky Survey |
177 |
 |
| 27 |
Extinction (astronomy) |
171 |
 |
| 28 |
Astronomical spectroscopy |
167 |
 |
| 29 |
Airmass |
165 |
 |
| 30 |
Phases of Venus |
159 |
 |
| 31 |
Airglow |
152 |
 |
| 32 |
Gamma-ray astronomy |
149 |
 |
| 33 |
Atmospheric refraction |
134 |
 |
| 34 |
Geometric albedo |
127 |
 |
| 35 |
Observational astronomy |
126 |
 |
| 36 |
Observing the Moon |
125 |
 |
| 37 |
SKY-MAP.ORG |
124 |
 |
| 38 |
Transient lunar phenomenon |
120 |
 |
| 39 |
Optical interferometry |
113 |
 |
| 40 |
Photometry (astronomy) |
108 |
 |
| 41 |
Heliacal rising |
100 |
 |
| 42 |
Scintillation (astronomy) |
98 |
 |
| 43 |
Ultraviolet astronomy |
97 |
 |
| 44 |
Opposition effect |
87 |
 |
| 45 |
Radar astronomy |
77 |
 |
| 46 |
Observational cosmology |
76 |
 |
| 47 |
Fingers of God |
72 |
 |
| 48 |
Visible-light astronomy |
72 |
 |
| 49 |
Timeline of telescopes, observatories, and observing technology |
71 |
 |
| 50 |
Submillimetre astronomy |
69 |
 |
| 51 |
Phase angle (astronomy) |
68 |
 |
| 52 |
Luminosity distance |
65 |
 |
| 53 |
Surface brightness |
64 |
 |
| 54 |
Astronomical survey |
63 |
 |
| 55 |
Averted vision |
60 |
 |
| 56 |
Granat |
59 |
 |
| 57 |
Sky brightness |
58 |
 |
| 58 |
Quasi-periodic oscillations |
47 |
 |
| 59 |
Nuller |
46 |
 |
| 60 |
Limiting magnitude |
44 |
 |
| 61 |
Zenithal Hourly Rate |
41 |
 |
| 62 |
High-energy astronomy |
37 |
 |
| 63 |
Blink comparator |
36 |
 |
| 64 |
Malmquist bias |
34 |
 |
| 65 |
Far-infrared astronomy |
33 |
 |
| 66 |
Redshift survey |
32 |
 |
| 67 |
Fizeau interferometer |
32 |
 |
| 68 |
Sounding rocket X-ray astronomy |
31 |
 |
| 69 |
Planetary phase |
30 |
 |
| 70 |
ESTAR |
30 |
 |
| 71 |
Gravitational wave astronomy |
29 |
 |
| 72 |
Bolometric Correction |
28 |
 |
| 73 |
Explorer 11 |
26 |
 |
| 74 |
Operation Moonwatch |
26 |
 |
| 75 |
Background (astronomy) |
25 |
 |
| 76 |
Star hopping |
25 |
 |
| 77 |
IACT |
25 |
 |
| 78 |
Interplanetary scintillation |
25 |
 |
| 79 |
X-ray background |
24 |
 |
| 80 |
Orion 1 and Orion 2 Space Observatories |
22 |
 |
| 81 |
AB magnitude |
22 |
 |
| 82 |
History of X-ray astronomy |
22 |
 |
| 83 |
Recessional velocity |
20 |
 |
| 84 |
Cosmic infrared background |
20 |
 |
| 85 |
Yale Observatory Zone Catalog |
20 |
 |
| 86 |
Balloons for X-ray astronomy |
20 |
 |
| 87 |
Astronomical X-ray sources |
20 |
 |
| 88 |
High Time Resolution Astrophysics |
19 |
 |
| 89 |
Coded aperture |
18 |
 |
| 90 |
Zenith camera |
17 |
 |
| 91 |
Umov effect |
17 |
 |
| 92 |
Istituto di Radioastronomia di Bologna |
16 |
 |
| 93 |
Infrared excess |
15 |
 |
| 94 |
OSO 6 |
15 |
 |
| 95 |
Reverberation mapping |
14 |
 |
| 96 |
UBV Photoelectric Photometry Catalogue |
14 |
 |
| 97 |
OSO 5 |
13 |
 |
| 98 |
Catalogue of rotational velocities of the stars |
12 |
 |
| 99 |
Regiment of the North Pole |
11 |
 |
| 100 |
Freeman Law |
11 |
 |
| 101 |
Astronomical optical interferometry |
11 |
 |
| 102 |
Opposition surge |
11 |
 |
| 103 |
Cygnus Superbubble |
11 |
 |
| 104 |
Guide star |
10 |
 |
| 105 |
JP11 |
10 |
 |
| 106 |
Orion-Eridanus Superbubble |
10 |
 |
| 107 |
Extrasolar X-ray source astrometry |
10 |
 |
| 108 |
Catalog of 5,268 Standard Stars Based on the Normal System N30 |
9 |
 |
| 109 |
TAOS: The Taiwanese-American Occultation Survey |
9 |
 |
| 110 |
3U 0430+37 |
9 |
 |
| 111 |
CfA Redshift Survey |
8 |
 |
| 112 |
Michelson stellar interferometer |
8 |
 |
| 113 |
Shallow sky |
7 |
 |
| 114 |
V Sagittae |
7 |
 |
| 115 |
Rocket Astrophysical Observatories K-2, K-3 and K-4 |
6 |
 |
| 116 |
Strong (source) |
6 |
 |
| 117 |
Grey atmosphere |
6 |
 |
| 118 |
Lockman Hole |
6 |
 |
| 119 |
Fairall 9 |
6 |
 |
| 120 |
Astronomical X-number notation |
6 |
 |
| 121 |
U.K. Schmidt-Caltech Asteroid Survey |
less than 5 views |
|
| 122 |
Sagittarius X-3 |
less than 5 views |
|
| 123 |
Blanco 1 |
less than 5 views |
|
| 124 |
Norma XR-2 |
less than 5 views |
|
| 125 |
Seeliger effect |
less than 5 views |
|
| 126 |
Weber bar |
less than 5 views |
|
| 127 |
Antoniadi scale |
less than 5 views |
|
| 128 |
Two-Micron Sky Survey |
less than 5 views |
|
| 129 |
Tasimeter |
less than 5 views |
|
| 130 |
Sagittarius XR-2 |
less than 5 views |
|
| 131 |
Sagittarius XR-3 |
less than 5 views |
|
| 132 |
Sagittarius XR-5 |
less than 5 views |
|
| 133 |
Centaurus X-2 |
less than 5 views |
|
| 134 |
Aquila X-1 |
less than 5 views |
|
| 135 |
Cygnus XR-2 |
less than 5 views |
|
| 136 |
Sagittarius XR-1 |
less than 5 views |
|
| 137 |
V 0332+53 |
less than 5 views |
|
| 138 |
Markarian 590 |
less than 5 views |
|