Exploration
The only spacecraft to visit Nereid is Voyager 2, which passed Nereid at a distance of 4,700,000 km (2,900,000 mi) between April 20 and August 19, 1989. Voyager 2 obtained 83 images of the moon with observation accuracies of 70 km (43 mi) to 800 km (500 mi). Prior to Voyager 2's arrival, observations of Nereid had been limited to ground-based observations that could only establish Nereid's intrinsic brightness and orbital elements. Although the images obtained by the space probe did not have enough resolution to allow surface features to be distinguished, Voyager 2 was able to measure the size of Nereid and did find that it was grey in colour and had a higher albedo than Neptune's other small satellites.
Read more about this topic: Nereid (moon)
Famous quotes containing the word exploration:
“Typography tended to alter language from a means of perception and exploration to a portable commodity.”
—Marshall McLuhan (1911–1980)
“I call her old. She has one family
Whose claim is good to being settled here
Before the era of colonization,
And before that of exploration even.
John Smith remarked them as he coasted by....”
—Robert Frost (1874–1963)
“The future author is one who discovers that language, the exploration and manipulation of the resources of language, will serve him in winning through to his way.”
—Thornton Wilder (1897–1975)