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:
“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)
“For women who do not love us, as for the “disappeared”, knowing that we no longer have any hope does not prevent us form continuing to wait. We live on our guard, on watch; women whose son has gone asea on a dangerous exploration imagine at any minute, although it has long been certain that he has perished, that he will enter, miraculously saved, and healthy.”
—Marcel Proust (1871–1922)
“Typography tended to alter language from a means of perception and exploration to a portable commodity.”
—Marshall McLuhan (1911–1980)