Planets form in the presence of abundant interstellar water inherited as ices from the parent molecular cloud.(Credit: NASA/JPL-Caltech/R. Hurt (SSC-Caltech)/ESO/J. Emerson/VISTA/Cambridge Astronomical Survey Unit)
via space
In astronomy, WIMPs, or weakly interacting massive particles, figure into one explanation of the dark matter problem.The particles are called “weakly interacting” because they seem not to have much interaction with normal matter (electrons, protons, and neutrons) other than gravitational attraction (thus “massive”). (Credit: NASA, ESA. Hubble)
via scientificamerican
It’s difficult to create a uniformly charged electric rod and even harder to measure the electric field at different points in space. (Credit: Rhett Allain)
via wired
One way that stars are categorized is by temperature. Since the temperature of a star can determine its visual color, this category scheme is known as spectral type. The main categories of spectral type are M, K, G, F, A, B, and O. The coolest stars (red dwarfs) being M, and the hottest stars being O. Our own Sun is a G star. (Credit: B Koberlein, NASA/JPL-Caltech)
via briankoberlein
