The Hubble Space Telescope has
reportedly reached a new milestone in its quest to measure the speed at which
the universe is expanding, and it strongly suggests that something strange is
going on in our cosmos.
Astronomers have recently
utilized telescopes like Hubble to measure how quickly the cosmos is expanding.
However, as the data were
refined, a peculiar finding was made. There is a considerable gap between
evidence from the immediate aftermath of the Big Bang and the universe's
current rate of expansion.
The discrepancy has been left
unsolved by scientists. However, it demonstrates that "something
weird"—possibly the result of as-yet-unidentified new physics—is occurring
in our universe.
For the past 30 years, Hubble
has been gathering information on a series of "milepost markers" in
space and time that can be used to determine how quickly the universe is
expanding away from Earth.
More than 40 of the markers
have reportedly been calibrated by NASA, enabling even greater precision than
before.
The Space Telescope Science
Institute (STScI) and Johns Hopkins University in Baltimore, Maryland, along
with Nobel Laureate Adam Riess said in a statement: "You are getting the
most precise measure of the expansion rate for the universe from the gold
standard of telescopes and cosmic mile markers."
He is the head of a team of
researchers that recently published a new study paper outlining the greatest
and probably final substantial upgrade from the Hubble Space Telescope,
tripling the prior set of mile markers and reexamining the data already
available.
When American astronomer Edwin
Hubble noticed that galaxies beyond our own looked to be moving away from us -
and moving faster the more away they are - he set out to find an exact estimate
of how quickly space was expanding. Since that time, researchers have been
trying to learn more about that expansion.
Both the rate of expansion and
the space telescope that has been researching it bear the name Hubble in
recognition of the astronomer's work.
The universe was found to be
expanding faster than predicted when the space telescope started gathering data
on it. While data indicate that it is closer to 73, astronomers predict that it
should be around 67.5 km/s per megaparsec, plus or minus 0.5.
The likelihood of astronomers
being off is one in a million. Instead, it suggests that there is still much to
learn about how the cosmos is developing and that the universe's evolution and
expansion are more complex than we previously imagined.
The newly launched James Webb
Space Telescope, which will soon send back its first observations, will be used
by scientists to delve deeper into this difficulty. They should be able to see
more recent, far-off, and detailed mileposts as a result.
Reference(s): NASA
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