It can be difficult to determine which galaxies belong to which group especially around the southern edge of the Virgo cluster where there is a confusion of
galaxies at different distances.
In the same field of view is NGC 4647 - a spiral
galaxy at a different distance.
Not exact matches
Earth is part of our solar system, our solar system is a very small neighborhood in a spiral arm of our
galaxy, our
galaxy is one of the smaller of the billions of
galaxies that are the residue of the Big Bang - this is where we are
at right now... using several
different types of telescopes analyzing several types of radiation and using our mathematics to calculate distortions in light waves to calculate dimensions,
distance and mass — doing this we can generate a physical picture of what is actually happening our there.
The next step, he says, will be to go for confirmation by surveying many more
galaxies — perhaps as many as 100 million —
at different distances, meaning
at different ages of the universe, to see if the effects produced by this first round remain consistent.
Without dark matter, the speeds should decrease with
distance from the
galaxy,
at different rates for the two
galaxy types.
«The more distant the
galaxy, the further back one is looking, so by measuring their
distances we can piece together a timeline of how vigorously the Universe was making new stars
at different stages of its 13.7 billion year life,» said Joaquin Vieira (California Institute of Technology, USA), lead author of the paper in the journal Nature.
«The more distant the
galaxy, the further back one is looking, so by measuring their
distances we can piece together a timeline of how vigorously the Universe was making new stars
at different stages of its 13.7 billion year life,» said lead author Joaquin Vieira of the California Institute of Technology.
«These
distance measurements allowed us to distinguish between pairs of
galaxies that were actual pairs in 3D (meaning both are
at the same
distance from us) as opposed to two
galaxies that appeared close on the sky but were actually
at very
different distances.»