Top 10 First Unmanned Moon Landings

1. Lunik 2
USSR, 1959

2. Ranger 4
US, 1962

3. Ranger 6
US, 1964

4. Ranger 7
US, 1964

5. Ranger 8
US, 1965

6. Ranger 9
US, 1965

7. Luna 5
USSR, 1965

8. Luna 7
USSR, 1965

9. Luna 8
USSR, 1965

10. Luna 9
USSR, 1966

Top 10 Largest Reflecting Telescopes

1. Keck I Telescope, Mauna Kea, Hawaii
Aperture 10.0 Meters

2. Keck II Telescope, Mauna Kea, Hawaii
Aperture 10.0 Meters

3. Hobby-Eberly Telescope, Mount Fowlkes, Texas
Aperture 9.2 Meters

4. Subaru Telescope, Mauna Kea, Hawaii
Aperture 8.3 Meters

5. Antu Telescope, Cerro Paranal, Chile
Aperture 8.2 Meters

6. Kueyen Telescope, Cerro Paranal, Chile
Aperture 8.2 Meters

7. Melipal Telescope, Cerro Paranal, Chile
Aperture 8.2 Meters

8. Yepun Telescope, Cerro Paranal, Chile
Aperture 8.2 Meters

9. Gemini North Telescope, Mauna Kea, Hawaii
Aperture 8.1 Meters

10. Gemini South Telescope, Cerro Paranal, Chile
Aperture 8.1 Meters

Top 10 Largest Solar System Bodies

1. Sun
1,392,140 KM Diameter

2. Jupiter
142,984 KM Diameter

3. Saturn
120,536 KM Diameter

4. Uranus
512,118 KM Diameter

5. Neptune
49,532 KM Diameter

6. Earth
12,756 KM Diameter

7. Venus
12,103 KM Diameter

8. Mars
6,794 KM Diameter

9. Ganymede
5,269 KM Diameter

10. Titan
5,150 KM Diameter 

Top 10 Galaxies Closest to the Earth

1. Large Cloud of Magellan     
169,000 leap year

2. Small cloud of Magellan
190,000 leap year

3. Ursa Minor dwarf
250,000 leap year

4. Draco dwarf
260,000 leap year

5. Sculptor dwarf
280,000 leap year

6. Fornax dwarf
420,000 leap year

7. Leo I dwarf
750,000 leap year

8. Leo II dwarf
750,000 leap year

9. Barnard’s Galaxy
1,700,000 leap year

10. Andromeda Spiral
2,200,000 leap year 

Top 10 Largest Meteorites

1.  Hoba West, Grootfontein, Namibia

Approximately 66 tons


2. Ahnighito, Cape York, West Greenland

63.1 tons


3. Campo del Cielo, Argentina

45.6 tons


4. Canyon Diablo, Arizona

33 tons


5. Sikhote-Alin, Russia

29.7 tons


6. Chupaderos, Mexico

26.6 tons


7. Bacuberito, Mexico

24.2 tons


8. Armanty, Western Mongolia

22 tons


9. Mundrabilla, Western Australia

18.7 tons


10. Mbosi, Tanzania

17 tons 

Top 10 Comets Closest to the Earth

1. Comet of 1491

1,406,220 KM


 
2. Lexell

2,258,928 KM

 
3. Tempel-Tuttle

3,425,791 KM


4. IRAS-Araki-Alcock

4,682,413 KM


5. Halley

4,996,569 KM


6. Biela

5,475,282 KM


7. Grischow

5,834,317 KM


8. Pons-Winnecke

5,894,156 KM


9. Comet of 1014

6,088,633 KM


10. La Hire

6,537,427 KM