How do asteroids appear in long exposure images?
A) as complex curving and looping lines B) as points of light, like the stars
C) as resolved disks, like the planets D) as straight lines across a background of stars
Question 2
In the Drake equation (Number of Civilizations = NHP flife fciv fnow), we expect the term fciv to be small if ________.
A) most of the civilizations that have ever existed are still out and about in the galaxy
B) primitive life is common but intelligent life is rare
C) most habitable planets never actually get life on them
D) most civilizations destroy themselves within just a few hundred years of arising
Electron Microscope Images of a Diatom
Scorpions, Spiders and Sharks: Electron-Microscope Images
In 2013, Americans learned that the federal government massively surveys their phone calls and e-mai
Wassily Kandinsky, Black Lines (Schwarze Linien).
Epiphyseal Plate in Long Bone Adolescent bone growth takes place along the epiphyseal plate
Experiments showing that long- or short-day plants flower in response to night length. Each horizont