PRESENTATION OUTLINE
CRATERS AROUND THE WORLD
- Vredefort crater- 300 km. wide
- Sudbury crater or basin- 250 km. wide
- Chicxulub crater- 180 km. wide
- Popigai crater- 90 km. wide
- Acraman crater- 90 km. wide
Vredefort crater
The Vredefort crater is the largest verified impact crater on Earth, more than 300 km across when it was formed.What remains of it is located in the present-day Free State Province of South Africa and named after the town of Vredefort, which is situated near its centre. Although the crater itself has long since eroded away, the remaining geological structures at its centre are known as the Vredefort Dome or Vredefort impact structure. In 2005, the Vredefort Dome was added to the list of UNESCO World Heritage Sites for its geologic interest.
Sudbury basin/crater
The Sudbury Basin, also known as Sudbury Structure or the Sudbury Nickel Irruptive, is a major geologic structure in Ontario, Canada. It is the second-largest known impact crater or astrobleme on Earth, as well as one of the oldest.
Chicxulub crater
The Chicxulub crater, Mayan pronunciation: [tʃʼikʃuluɓ]) is a prehistoric impact crater buried underneath the Yucatán Peninsula in Mexico.Its center is located near the town of Chicxulub, after which the crater is named. The age of the Chicxulub asteroid impact and the Cretaceous–Paleogene boundary (K–Pg boundary) coincide precisely.The crater is more than 180 kilometres (110 mi) in diameter and 20 km (12 mi) in depth, making the feature one of the largest confirmed impact structures on Earth; the impacting bolide that formed the crater was at least 10 km (6 mi) in diameter.
Popigai crater
The Popigai crater (or astrobleme) in Siberia, Russia is tied with the Manicouagan Crater as the fourth largest verified impact crater on Earth.A large bolide impact created the 100 kilometres (62 mi) diameter crater approximately 35 million years ago during the late Eocene epoch (Priabonian stage).The crater is 300 km east from the outpost of Khatanga and 880 km (550 mi) NE of the city of Norilsk. It is designated by UNESCO as a Geopark, a site of special geological heritage.
Acraman crater
Acraman crater is a deeply eroded impact crater in the Gawler Ranges of South Australia.Its location is marked by Lake Acraman, a circular ephemeral playa lake about 20 km in diameter.
Comet Encke-3.3 years
Shoemaker Levy- 10 years
Halley's Comet- 76 years
Comet Swift- Tuttle- 120 years
Comet Ikeya-Seki- 580 years
Comet Humason- 2940 years
Comet Hale Bopp- 4000 years
Comet hyatuke- 30000 years
Comet Kohoutek- 150000 years
Comet West- 250000 years
AVERAGE DISTANCE FROMTHE SUN
Comet Encke- 2.21 AU
Shoemaker Levy- 4.64 AU
Halley's Comet- 17.94 AU
Comet Swift- Tuttle- 24.33 AU
Comet Ikeya-Seki- 91.83 AU
Comet Humason- 205.23 AU
Comet Hale Bopp- 251.98 AU
Comet hyatuke- 965.49 AU
Comet Kohoutek- 2,823.11 AU
Comet West- 3968.50 AU
LAST APPARITION AND EXPECTED APPEARANCE
Comet Encke- 1786 : 2017
Shoemaker Levy- 1993 : 2023
Halley's Comet- 1986 : 2062
Comet Swift- Tuttle- 1986 : 2815
Comet Ikeya-Seki- 1965 : 2162
Comet Humason- 1961 : 4910
Comet Hale Bopp- 1997 : 4385
Comet hyatuke- 1996 : 31996
Comet Kohoutek- 1973 : 151973
Comet West- 1976 : 251975
Pluto
Pluto is 2274 km diameter and has a spherical shape
Ceres
Ceres is 975 km in diameter and has a spherical shape
Eris
Eris is 2326 km in diameter and has a spherical shape
Makemake
Makemake is 1960 km in diameter and has a spherical shape
Haumea
Haumea is 1436 km in diameter and has a Ellipsoid shape
