As light from the quasar travels toward Earth,
it passes by the galaxy and through the primordial gas, before reaching our telescopes.
Not exact matches
Infrared radiation
passes through interstellar dust much more easily than visible light, so
by looking at the infrared light from a
galaxy we can learn about the new stars forming within the clouds of dust and gas.
Decades
passed before astronomical technology verified that idea: It wasn't until 1979 that astronomers detected a real - life example of a gravitational lens in the double image of a quasar — side -
by - side glimpses of a
galaxy's blazing heart, resembling a pair of oncoming headlights.
If two neutron stars were to merge in a nearby
galaxy, the resulting wave would squish and stretch the space - time near Earth
by about a millionth of the diameter of an atom as it
passed through us.
And
by analyzing the light as it
passes through clouds of gas and on its way to Earth, astronomers will glean the compositions of the earliest
galaxies, Lamb adds.
They observed the
galaxy using a special band -
pass filter that selectively transmits the light around an emission line produced
by ionized hydrogen (called the H - alpha emission line).
Other scenarios involve gravitational perturbations, either caused
by passing stars, a solar system entering and exiting our
galaxy's gravitationally dense spiral arms, or even via interactions with dense molecular clouds.
«Many of the stars in the bridge appear to have been removed from the SMC in the most recent interaction, some 200 million years ago, when the dwarf
galaxies passed relatively close
by each other.
These rare systems — only a few tens were known until recently — were thought to have had their outer coats of stars ripped away
by the gravity of other, larger
galaxies as they
passed nearby, a theory supported
by the fact that they were usually found in the centers of large clusters of
galaxies.
Light is affected
by gravity, and light
passing a distant
galaxy will be deflected as a result.
The
galaxies were initially found
by the absorption of background quasar light
passing through the
galaxies.
The scientists concluded that B3 1715 +425 is what has remained of a
galaxy that
passed through the larger
galaxy and had most of its stars and gas stripped away
by the encounter — a «nearly naked» supermassive black hole.
When two
galaxies collide the stars will
pass right on
by each other without colliding.
This discovery of this system is part of a large survey for quasar sightlines which
pass near
galaxies, which is coordinated
by Joseph Hennawi, the leader of theENIGMA research group at the Max Planck Institute for Astronomy.
In fact, the ring - like shape is the result of the gravitational disruption caused
by a small intruder
galaxy passing through a large one, compressing the interstellar gas and dust, and causing a wave of star formation wave to move out from the impact point like a ripple across the surface of a pond.
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As the year's
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