Beginner Why do supernova remnants look like rings rather than spheres? Intermediate Why are there no craters on Earth? Only very very shallow impacts form elliptical craters, but they do exist!
Intermediate Have the inner planets cleared their neighborhood? New material holds promise for more secure computing February 26, 2019 As computers advance, encryption methods currently used to keep everything from financial transactions to military secrets secure might soon be useless, technology experts warn.
Unfortunately, the authors may need to wait more than a little while to conclusively test their hypothesis-until the Moon is next rocked by a massive asteroid, an event not expected to occur in the foreseeable future.
What Is a Meteor Shower? Intermediate What do I need to do to become an astronomer?
Though they were made in 1971, these Apollo 14 astronauts' tracks were easily viewed from a NASA spacecraft in orbit around the moon in 2011 tracks highlighted in yellow. With few exceptions, even the largest craters areeventually destroyed by the processes of plate tectonics. Intermediate Why are there high tides during a Full Moon?
Beginner How far is each planet from Earth? The moon once had large volcanic flows way in the past that did cover up many of the bigger earlier impacts, but it has been without volcanism for around three billion years. The Orientale basin, the Moon's most recently formed sizeable crater, stands out from the rest.
Did all the meteorites miss us? Intermediate Are there telescopes that can see the flag and lunar rover on the Moon? Why do all impact craters appear round as if they all come from strikes that are perpendicular to the surface of the impacted surface?
Intermediate Can artificial gravity be created in space? Beginner At what speed does the Earth move around the Sun? The finding has implications for how astronomersdate the ages of planetary surfaces. Similarly, Marshas thin atmosphere and relatively little geologic activity.