Astronomers Discover Unusual Galaxy That Should Not Exist
Video Credit: Wibbitz Top Stories - Duration: 01:31s - Published
Astronomers Discover Unusual Galaxy That Should Not Exist
Astronomers Discover , Unusual Galaxy , That Should Not Exist.
'Newsweek' reports that NASA's
James Webb Telescope has discovered
a new galaxy that shouldn't exist.
.
The dwarf galaxy, referred to as PEARLSDG,
was spotted in an area of space where
astronomers were not expecting to find anything.
A new paper in the 'Astrophysical Journal Letters'
details the strange properties of PEARLSDG,
chiefly how it appears to not be forming new stars.
Normally, dwarf galaxies
orbit larger galaxies, which
influences their formation.
.
Our Milky Way is orbited by
about 20 dwarf galaxies, like the Small
Magellanic Cloud and Triangulum II.
PEARLSDG appears to not be
interacting with any nearby galaxies,
while also not forming any new stars.
Scientists now believe PEARLSDG
is a rare isolated quiescent galaxy.
.
These types of isolated quiescent
dwarf galaxies haven't really been seen
before except for relatively few cases, Tim Carleton, paper co-author and an assistant research
scientist at Arizona State University, via 'Newsweek'.
They are not really expected to
exist given our current understanding
of galaxy evolution, so the fact that we
see this object helps us improve our
theories for galaxy formation, Tim Carleton, paper co-author and an assistant research
scientist at Arizona State University, via 'Newsweek'.
Generally, dwarf galaxies that
are out there by themselves are
continuing to form new stars, Tim Carleton, paper co-author and an assistant research
scientist at Arizona State University, via 'Newsweek'.
'Newsweek' reports that the findings suggest that
astronomers have much more to learn about dwarf
galaxies, including how they evolve over time.
Two astronauts who have been stuck on the International Space Station (ISS) for over a month are talking to reporters for the first time on Wednesday afternoon. Sky News
Recently Spotted Asteroid, Set for Near Miss With Earth.
ABC reports that an asteroid
is set to make a close pass
by Earth this weekend.
Asteroid 2024 MK should
be visible with the proper
equipment and timing. .
Asteroid 2024 MK should
be visible with the proper
equipment and timing. .
The space rock will make its closest approach past
Earth early on June 29, passing at just three-quarters
of the distance between the Earth and the Moon.
The asteroid, which was first spotted two
weeks ago by an observatory in South Africa,
is estimated to be about 393 feet to 853 feet wide.
According to asteroid expert Davide Farnocchia,
who works for NASA's Center for Near-Earth
Object Studies, asteroids the size of 2024 MK
only pass by about every 25 years.
We’re going to see a few
of those during our lifetimes,
but it’s not something that
happens every other day, Davide Farnocchia, NASA Center for
Near-Earth Object Studies, via ABC.
On June 27, a 7,579-foot asteroid just passed
the Earth at a slightly greater distance and
was only visible with professional telescopes.
The upcoming 2024 MK will be visible
with a small telescope but will not
be visible to the naked eye. .
ABC reports that skywatchers in
the Southern Hemisphere will have
the best odds of spotting the asteroid.
The next major asteroid is set for April 13, 2029,
when Apophis will pass Earth and be visible with
the naked eye to viewers in Europe, Africa and Asia.
Credit: Wibbitz Top Stories Duration: 01:31Published
Astronomers Think Powerful , Magnetic Winds Drive Growth , of Supermassive Black Holes.
'Newsweek' reports that scientists may have
unraveled the mystery of how supermassive
black holes are able to become so massive.
According to a new paper, a powerful magnetic
wind, comparable to water swirling around
a drain, is what allows these massive cosmic
phenomena to reach such immense sizes.
A supermassive black hole is typically millions to
billions of times more massive than our own sun
and is often found at the center of most galaxies. .
The paper, which was published in the journal 'Astronomy
and Astrophysics,' focused on the black hole at the
center of a galaxy about 120 million light-years from Earth.
This galaxy, known as ESO320-G030, is much more
active than our own Milky Way, with a rate of star
formation 10 times that of our own galaxy.
Using the Atacama Large Millimeter Array (ALMA) telescope,
researchers found a strong, rotating, magnetized
wind spinning around the center of the black hole.
Using the Atacama Large Millimeter Array (ALMA) telescope,
researchers found a strong, rotating, magnetized
wind spinning around the center of the black hole.
Since this galaxy is very
luminous in the infrared,
telescopes can resolve
striking details in its center. , Susanne Aalto, study co-author and a professor
of radio astronomy at Chalmers University
of Technology, via 'Newsweek'.
'Newsweek' reports that the team now hopes to observe the
centers of other galaxies to confirm if this process is what
enables a supermassive black hole's immense growth.
Far from all questions about this
process are answered. In our
observations we see clear evidence
of a rotating wind that helps
regulate the growth of the
galaxy's central black hole. , Mark Gorski, study co-author and an astronomer
at Chalmers University of Technology and
Northwestern University, via 'Newsweek'.
Now that we know what to look for,
the next step is to find out how
common a phenomenon this is.
And if this is a stage which all
galaxies with supermassive
black holes go through,
what happens to them next?, Mark Gorski, study co-author and an astronomer
at Chalmers University of Technology and
Northwestern University, via 'Newsweek'
Credit: Wibbitz Top Stories Duration: 01:31Published
Scientists Use 'Dyson Sphere' , Signature to Search for , Potential Alien Life.
Decades ago, physicist Freeman Dyson theorized that a
shell made of solar panels that surrounds a star would be
the ultimate energy solution for an advanced civilization. .
One should expect that, within a few
thousand years of its entering the stage
of industrial development, any intelligent
species should be found occupying an
artificial biosphere which completely
surrounds its parent star, Freeman Dyson, 1960 paper, via CNN.
CNN reports that the concept took
hold and the hypothetical megastructures
have come to be called Dyson spheres. .
At the time, Dyson suggested that
these spheres would emit waste heat
as detectable infrared radiation.
The British American physicist suggested
that this unique radiation signature could
be a way of finding extraterrestrial life. .
It would be much more
rewarding to search directly
for intelligence, but technology
is the only thing we have
any chance of seeing, Matías Suazo, Lead study author and a doctoral student
in the department of physics and astronomy
of Uppsala University in Sweden, via CNN.
A new study searched five million stars in the Milky Way
galaxy to find seven candidates that could potentially
be home to an advanced civilization's Dyson sphere.
It’s difficult for us to find
an explanation for these sources,
because we don’t have enough
data to prove what is the real
cause of the infrared glow, Matías Suazo, Lead study author and a doctoral student in
the department of physics and astronomy of
Uppsala University in Sweden, via CNN.
It’s difficult for us to find
an explanation for these sources,
because we don’t have enough
data to prove what is the real
cause of the infrared glow, Matías Suazo, Lead study author and a doctoral student in
the department of physics and astronomy of
Uppsala University in Sweden, via CNN.
They could be Dyson spheres,
because they behave like our
models predict, but they could
be something else as well, Matías Suazo, Lead study author and a doctoral student
in the department of physics and astronomy
of Uppsala University in Sweden, via CNN.
The team's findings were published
in the journal 'Monthly Notices of
the Royal Astronomical Society.'
Credit: Wibbitz Top Stories Duration: 01:31Published
Gaia Telescope Reveals Precise , Date of the Milky Way's Last , Act of Galactic Cannibalism.
Space.com reports that the latest findings from the Gaia
space telescope suggest that our Milky Way Galaxy may
have cannibalized a smaller galaxy relatively recently. .
The last major collision between the Milky Way
and another galaxy appears to have occurred billions
of years closer to now than previously believed.
Scientists have long known that the
Milky Way was formed through a series
of violent collisions with other galaxies. .
These massive collisions distribute stars
from the consumed galaxy throughout the
halo that surrounds the Milky Way's main disk. .
Galactic cannibalism sends "wrinkles"
through the galaxy, impacting different
families of stars in a number of ways.
Gaia now looks to retell the story of the
Milky Way by quantifying those wrinkles.
We get wrinklier as we age,
but our work reveals that the
opposite is true for the Milky Way.
It’s a sort of cosmic Benjamin Button,
getting less wrinkly over time. , Thomas Donlon, Study team leader of the Rensselaer Polytechnic
Institute and University of Alabama scientist, via Space.com.
By looking at how these
wrinkles dissipate over time,
we can trace when the Milky Way
experienced its last big crash –
and it turns out this happened billions
of years later than we thought, Thomas Donlon, Study team leader of the Rensselaer Polytechnic
Institute and University of Alabama scientist, via Space.com.
Astronomers have only been aware of these
wrinkles since Gaia discovered them in 2018. .
The latest findings represent the first time they have
been extensively investigated to find the
precise timing of the collision that spawned them.
Credit: Wibbitz Top Stories Duration: 01:30Published