Assertion: pulsar's beam | /r/CapableOf | sweep over earth
Facets:
value: like a lighthouse beam
type: MANNER
value: like light from a lighthouse
type: MANNER
Source sentences:
text: If that beam sweeps over Earth, we see it as a regular pulse of light.
text: Like a ship in the ocean that sees only regular flashes of light, we see pulsars "turn on and off" as the beam sweeps over the Earth.
text: If the beam sweeps past Earth, you see a flash of light.
text: If a pulsar is pointed toward our planet, we see these beams sweep across Earth like light from a lighthouse.
text: It's the same reason a lighthouse appears to blink when seen by a sailor on the ocean: As the pulsar rotates, the beam of light may sweep across the Earth, then swing out of view, then swing back around again.
text: When the beam crosses our line-of-sight, we see a pulse  in other words, we see pulsars turn on and off as the beam sweeps over Earth.
text: The rotating neutron star acts like a lighthouse, sweeping its beam in a circle and giving us a pulse of radiation when the beam sweeps over Earth.
text: As each beam sweeps over Earth, like a lighthouse beam sweeping over a distant ship, we see a short pulse of radiation.
text: As each beam sweeps over Earth, like a lighthouse beam sweeping over a distant ship, we see a short pulse of radiation.
text: As a ship in the ocean that sees only regular flashes of light from a lighthouse, we on Earth see pulsars turn on and off as the beam sweeps over the Earth.
text: Like a ship in the ocean that sees only regular flashes of light, we see pulsars turn on and off as the beam sweeps over the Earth.
text: Like a ship in the ocean that sees only regular flashes of light, we see pulsars "turn on and off" as the beam sweeps over the Earth.