over 1,000 miles
Not by people.Exploratory space vehicles carrying robotic scientific instrumentation and communications equipment have surveyed Mars from orbit, and have landed and explored its surface. But there has been no "manned" (peopled) voyage to that planet.A NASA program has been proposed that could lead to a manned landing on Mars some time after 2020; but the chances of it being adopted are considered slim, mainly because of budgetary considerations.
You know that Mt. Erin is more than 350 m above sea level because the mountain has been measured and mapped. You can find the information regarding elevation on most maps.
Discovery is NASA's oldest space shuttle and it has been in flight for more than 25 years. Currently, it has traveled 148,221,675 miles.
On the planet Earth, about 30 miles in day time due to plant curvature; light from explosion - about 100 miles at night if atmospheric conditions are favorable.
The average tornado is about 50 yards wide, but they have been recorded up to 2.5 miles wide (the record).
More then 390 miles of passageways have been mapped.
over 1,000 miles
over 1,000 miles
over 1,000 miles
Over 390 miles.
Over 400 miles of passageways have been mapped and surveyed in Mammoth Cave National Park, making it the world's longest known cave system. Extensive exploration and mapping efforts have been ongoing to document the complex network of underground passages and chambers.
* Stalactites grow from the top down. * Stalagmites grow from the bottom up. * When they join you have a column. The other forms of speleothems include: * Flowstone * Dripstone * Anthodites * Helicites * Chandeliers * Straws and * Draperies Cave popcorn, snotties and cave pearls also exist and 10 mm cave pearls and larger are special finds for speleologists,
Over 390 miles
Over 390 miles of passageways have been mapped.
morm them a millal
I do not know. If you are so curious go and count.
As a verb. The terrain has been mapped for the upcoming incursion.