Physics in the News

Thursday, September 25, 2014

Much of Earth’s Water Is Older Than the Sun

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)

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

Dark Matter Looks WIMPy

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)

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

A Numerical Calculation of the Electric Field Due to a Charge Distribution

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)

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

CubeSat craze could create space debris catastrophe

via newscientist

The Coolest Star

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)

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

Force of nature gave life its asymmetry

Life is made largely of molecules that are different than their mirror images. (Credit: Notjustnut/Getty)

Life is made largely of molecules that are different than their mirror images. (Credit: Notjustnut/Getty)

via nature

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