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KohoutekdiscoveredComet Kohoutek
Czech astronomer Lubos Kohoutek(passive) was discovered byComet Kohoutek
by Czech astronomer Lubos Kohoutek(passive) discovered byComet Kohoutek
Czech astronomer Lubos Kohoutek(passive) discovered byComet Kohoutek
March(passive) is discoveredComet Kohoutek
in March(passive) was discoveredComet Kohoutek
in October 1983(passive) was discoveredcomet." Phaethon
in January(passive) was just discoveredComet Pojmanski
Rosetta(passive) is setComet 67P
Aren Heinze(passive) was discovered byComet Heinze
in 1969(passive) was discoveredComet 67P
Crimean amateur astronomer Gennadiy Borisov(passive) was discovered byComet Borisov
MIT 's Lincoln Near Earth Asteroid Research ( LINEAR ) survey(passive) was discovered byComet 252P
on December 20 , 1900(passive) was discoveredComet 21P
by Russian Scientists Russian astronomers(passive) Discovered byComet
at the end of May(passive) was discoveredComet Boattini
by ESA & NASA Solar Observatory June 19(passive) Discovered byComet
Amateur astronomersdiscoveredcomet _ _ _ _ _ - _ _ _ _ _
by amateur astronomers(passive) discovered bycomet
the most mysterious amateur astronomerdiscoveredComet
The Lincoln Near - Earth Asteroid Research ( LINEAR ) teamdiscoveredComet
the example of the late great Australian comet hunter , Bill Bradfield ,discoveredcomet
by ESA & NASA Solar Observatory(passive) Discovered byComet
Comet Hale - Bopp Comet Hale - Bopp discoveredComet
back on Dec. 21 , 1900(passive) was discoveredComet 21P
Messier 's comet search ... January 7 , 1785 , ... 1785discoveredcomet
Ukrainian amateur astronomer Gennady Borisov(passive) has been discovered bycomet
First comet of 1997discoveredComet
November Astronomersdiscovercomet
by European astronomers Wilhelm Tempel and Horace Tuttle(passive) discovered bycomet
by ESA and NASA Solar Observatory Science Daily Astronomy(passive) discovered bycomet
in late July 2002(passive) was first discoveredComet Hoenig
Maria Mitchelldiscoveredcomet
Previous Terry Lovejoydiscoverscomet
Terry Lovejoy(passive) was discovered bycomet
by Terry Lovejoy(passive) discovered byComet
by University of Hawaii astronomers(passive) just discovered bycomet
Robert McNaught 7 August 2006(passive) was discovered bycomet
Alan Hale and Thomas BoppdiscoveredComet
Ernst Wilhelm Leberecht(passive) was discovered byComet Tempel
the Eta Aquarids meteor shower each May.also causesthe Eta Aquarids meteor shower each May.
a natural disaster(passive) caused bya natural disaster
The first of her kind(passive) was designedThe first of her kind
independentlydiscoveredindependently
in 1973was discoveredin 1973
co - operatives(passive) led byco - operatives
in June 2011discoveredin June 2011
masswould causemass
in the Kuiper beltoriginatedin the Kuiper belt
the New Arona taphave designedthe New Arona tap
behind Mt. Cathedralsetsbehind Mt. Cathedral
in 1969discoveredin 1969
the grounding of the entire fleetpromptedthe grounding of the entire fleet
from the region of the Oort 's Cloudoriginatingfrom the region of the Oort 's Cloud
in the sixties by Churyumov and Gerasimenkowas ... discoveredin the sixties by Churyumov and Gerasimenko
to collide with Earth and cause a mass extinctionsetto collide with Earth and cause a mass extinction
Perseids meteor shower could crash into EarthcausesPerseids meteor shower could crash into Earth
a global cataclysm if it hit Earthwould causea global cataclysm if it hit Earth
great Chicago fire SUN 5 causedgreat Chicago fire SUN 5
great Chicago fire SUN 5causedgreat Chicago fire SUN 5
catastrophe on Earthmay have causedcatastrophe on Earth
of dust and icecomposed mainlyof dust and ice
some water to the earthmay have contributedsome water to the earth
the grounding of the entire fleet pending an investigationpromptedthe grounding of the entire fleet pending an investigation
in the Oort cloudoriginatedin the Oort cloud
Massive Solar ExplosionDid ... CauseMassive Solar Explosion
Tunguska explosioncausedTunguska explosion
Tunguska explosion andcausedTunguska explosion and
Perseids meteor showercausesPerseids meteor shower
in a meteor shower that had an astounding 3,000 meteors per hour visibleresultedin a meteor shower that had an astounding 3,000 meteors per hour visible
of millimetre - sized dust pebblesis composedof millimetre - sized dust pebbles
a massive alien spacecraftdiscoversa massive alien spacecraft
of dust and rock particlescomposedof dust and rock particles
from the spacecraft imagesdiscoveredfrom the spacecraft images
solar explosion Not likelyDid ... causesolar explosion Not likely
widespread large mammal extinctionsmay have causedwidespread large mammal extinctions
solar explosionDid ... causesolar explosion
of ice not solid space rockmainly composedof ice not solid space rock
of ice not solid space rock , and moremainly composedof ice not solid space rock , and more
a massive CME ( solar flare ) in the direction of Earthcould causea massive CME ( solar flare ) in the direction of Earth