-
3951 - Index of Reviews 3951 to 3999
- This index is of the 50 reviews from
3851 to 3999. Indices of all previous reviews is available
upon request. Writing style is
stochatto with each paragraph an idea and limited to a fewpages in total. Comments are always welcome. See https:://jimdetrick@blogspot.net
----------------------------------------------------------------------------
-
------------------ 3951-
Index of Reviews 3951 to 3999
-
- 3951
- JAMES
WEBB - discoveres early galaxies? -
The James Webb Space Telescope has discovered a group of galaxies from
the dawn of the universe that are so massive they shouldn't exist. The six
gargantuan galaxies contain almost as many stars as the Milky Way despite
forming only 500 to 700 million years after the Big Bang.
-
- 3952
- EXOPLANET DISCOVERIES
- more planets. An Earth-size exoplanet spotted just 72
light-years away. Researchers hope to
discover more exoplanets in this K2-415 system.
-
- 3953
- CASSIOPEIA - new supernovae discoveries? Cassiopeia A (Cas A) is a supernova remnant
located about 11,000 light-years from Earth in the constellation Cassiopeia. It
spans approximately 10 light-years in diameter.
-
- 3954
- BLACKHOLES -
super massive? How does the
Universe produce Ultra-Massive Black Holes?
Black holes are the most massive objects that we know of in the
Universe. Not stellar mass black holes, not supermassive black holes (SMBHs,)
but ultra-massive black holes (UMBHs.)
-
- 3955
- NANCY GRACE
TELESCOPE - back in time? The Nancy Grace Roman Space Telescope will
'rewind' the universe. The powerful
space telescope will take a vastly wider look at the universe than Hubble or
the James Webb Space Telescope.
- 3956
- DARK
MATTER - to explain the Universe? Einstein was right about invisible dark
matter, a massive new map of the universe suggests. Light produced just 380,000
years after the Big Bang was warped by the universe's dark matter exactly the
way Einstein predicted it would be.
- 3957
- SAGITTARIUS - the
center of our galaxy? At the center of
the Milky Way, there is a massive persistent radio source known as Sagittarius
A*. Since the 1970s, astronomers have known that this source is a supermassive
black hole (SMBH) roughly 4 million times the mass of our Sun.
-
- 3958 - EINSTEIN
- theories proven correct? Albert Einstein's theories of relativity
have been proven to be true time and again in the more than 100 years. Einstein predicted the existence of
gravitational lensing 100 years before the James Webb Space Telesciope used the
phenomenon to peer 13 billion years into the past.
-
- 3959 - TIME
- is it real? - Time is the apparent progression of events
from past to future. While it's impossible to completely define the nature of
time. Causes lead naturally to effects,
we remember the past but not the future and the evolution of time appears to be
continuous and irreversible.
-
- 3960
- PHYSICS -
Strandard Model of Physics -
With few exceptions, it has stood up to this scrutiny, passing
experimental test after experimental test with flying colors. But this wildly
successful model has conceptual gaps that suggest there is a bit more to be
learned about how the universe works.
-
- 3961
- ICE AGE -
cycles of Earth's environment?
Our planet hasn’t always been the warm, inviting place we know today. At
least five times in its history, Earth froze over, locked in the grip of an ice
age. Scientists sometimes refer to these periods as “Snowball Earth.”
-
- 3962
- COMETS -
erupt like volcanoes? The
newly discovered comet “C/2023 A3” is making a close approach around the sun
for the first time in 80,000 years, and might be as bright as a star in fall
2024.
-
- 3963
- ASTEROIDS - near
miss? The potentially hazardous
asteroid “2023 FM” is larger than a 40-story building and will zoom within 7.5
lunar distances from Earth on Thursday, April 6, 2023.
-
- 3964
- ASTRONOMY -
gives us amazong science? - December, 2022, astronomers using the Atacama
Large Millimeter / submillimeter Array (ALMA) confirmed the discovery of one of
the most distant galaxies ever observed. The faint radio light ALMA captured
began its journey to us when the universe was less than 360 million years old.
-
- 3965
- GALAXIES - how
the first ones formed? On Earth, we
often take our planet’s magnetic field for granted. It protects living
creatures from the sun’s rays, draws compass needles north and even creates
beautiful auroras. Other worlds in our solar system have magnetic fields too,
but , what about Earth-like planets around other stars?
-
- 3966
- HUBBLE -
images early galaxies. - Since its launch in 1990, the Hubble Space
Telescope has made more than one million observations of the universe, broadening humanity's knowledge of the cosmos
almost immeasurably.
-
- 3967
- UNIVERSE -
earliest structure defined? SLAC
cosmologists are currently attempting to expand the size of computer
simulations of the cosmos while improving accuracy. They will also look at how these
observations conform to other cosmological models.
-
- 3968
- EXOPLANETS -
discoverring planets around stars?
Scientists have discovered more than 4,000 alien planets since spotting
the first ones orbiting a star beyond our sun back in 1992.
-
- 3969
- DWARF PLANET
- Haumea. Haumea is a “dwarf planet” that was first
spotted by astronomers looking at observations made between 2003 and 2004,
earning it the name “2003 EL61”.
-
- 3970 -
TELESCOPES - workng together? What’s possible when Earth and space-based
telescopes work together? The potential benefits of coordinating ground,
orbital and in situ based observations of objects can benefit from the type of
coordinated output that can only come from a cohesive team.
-
- 3971
- LIFE
- how will we detect it on
exoplanets? Is there life on Mars? Been part of science fiction dramas for
decades. But, so far most of humanity’s
forays into the Solar System seeking signs of life have returned only
ambiguity.
-
- 3972
- BENNU
ASTEROID - sample returns September, 2023. The OSIRIS-REx mission unleashed an
unexpected explosion when it touched down on asteroid Bennu in October 2020 to
collect a precious sample to carry home to Earth.
-
- 3973
- MARS
- has two moons! Mars's two moons, Phobos and Deimos, have
puzzled researchers since their discovery in 1877. They are very small:
Phobos's diameter of 22 kilometers is 160 times smaller than that of our moon,
and Deimos is even smaller, with a diameter of only 12 kilometers.
-
- 3974
- ELECROMAGNETIC SPECTRUM
- more than meets the eye. Parts
of the electromagnetic spectrum invisible to human eyes reveal a vast amount of
information about the universe, but it took a long time for astronomers to
learn how to view it.
-
- 3975
- TYCHO
SUPERNOVA - new discoeries since 1572. NASA’s “Imaging X-ray Polarimetry Explorer”
(IXPE) has uncovered new information about the Tycho supernova remnant, an
exploded star in the constellation Cassiopeia, the light from which was first
seen on Earth in 1572.
-
- 3976
- FAST
RADIO BURSTS - what
can they tell us? Recent observations
from the “Very Large Array” (VLA) radio telescopes in New Mexico revealed
evidence of a magnetic field on the rocky exoplanet “YZ Ceti b”, which orbits a
star about 12 light-years away from Earth.
-
- 3977 - JAMES
WEBB - found oldest galaxies. James Webb Space Telescope spots huge
galactic protocluster in the early universe,The developing cluster of galaxies
existed just 650 million years after the Big Bang and could help answer
fundamental questions about the evolution of the universe.
-
- 3978
- X-RAY
GALAXIES - new revelations. Astronomer's will depend on getting more
data from “simulated galactic clusters”. SLAC cosmologists are currently
attempting to expand the size of computer simulations of the cosmos while
improving accuracy.
-
-
3979 - UNIVERSE
- first light? By measuring the Cosmic Microwave
Background for redshift and comparing these to local distance measurements
(using variable stars and supernovae), astronomers have sought to measure the
rate at which the universe is expanding.
-
- 3980
- PERSEVERANCE -
Heliocopter on Mars - “Perseverance” is a rover on Mars that carriers a heliocopter
with it, called “Ingenuity”. The tiny
Ingenuity chopper recently did its 51st flight on Mars.
-
- 3981 - TESS -
exoplanet survey? TESS
(Transiting Exoplanet Survey Satellite) mission recently reached its fifth
anniversary of service to humanity as it continues to tirelessly scan the
heavens for worlds beyond. Dubbed as an all-sky mission.
-
-
3982 - SUPERNOVAE - when
are they dangerous? Supernovae
superflares may be accompanied by enormous eruptions of charged particles that
could devastate life on any planets in their firing line.
-
-
3983 - QUASAR
- largest found. Quasars, the most extreme phenomena in the
universe, are triggered when galactic collisions deliver gas to feeding black
holes.
-
-
3984 - LIGHTNING BOLTS
- can become superbolts? Lightning forms when electrical charges in
clouds and on the ground interact, and in most of these events the clouds are
negatively charged. However, superbolts form during rare cloud-to-ground
interactions in which the clouds are positively charged.
-
-
3985 - BLACKHOLES
- the most massive? These massive black holes sit in the center
of galaxies, but they have more than five billion solar masses, an
astonishingly large amount of mass. The largest black hole we know of is
“Phoenix A”, a black hole with up to 100 billion solar masses.
-
-
3986 - EINSTEIN'S
THEORIES - they still hold up? The theory of gravity, called general
relativity (GR), was first cooked up by Albert Einstein in a magnificent feat
that took seven years to complete and provided amazing insights into how the
world works.
-
-
3987 - DARK
MATTER - controls universe expansion? The
map including all of the dark matter, going back to the Big Bang, and
the other maps are looking back about 9 billion years, giving us a layer that
is much closer to us. We can compare the two to learn about the growth of
structures in the universe.
-
-
3988 - BIG
BANG - James Webb new look? The James Webb Space Telescope (JWST)
appears to be finding multiple galaxies that grew too massive too soon after
the Big Bang, if the standard model of cosmology is to be believed.
-
- 3989 - UNIVERSE - how
big is it? Planck’s satellite findings
were published in 2015. By carefully examining the microwave background
radiation, astronomers have pinned down the universe’s age to 13.8 billion
years, accurate to better than 1 percent.
And that is how big it is too, in lightyears.
-
-
3990 - GAMMA
RAY BURSTS - what causes them? Gamma Ray Bursts occur somewhere in the sky
on average once per day. There is some
significant violence happening out there and we are just beginning to
understand what causes it. An announcement
will be made shortly. Stay tuned
-
-
3991 - ARTEMIS
SPACE MISSION -
humans on the moon? Artemis 2
will be the first mission to carry humans to the moon's vicinity since 1972.
Artemis 2 is the second scheduled flight of the Artemis program and the first
crewed Artemis mission.
-
-
3992 - DARK
ENERGY - expanding the Universe? Most astronomical data we have today
confirms the fact that the Universe is still expanding at an ever increasing
rate. The cause is suspected to be some
type of anti-gravity that is named “ Dark Energy”
-
- 3993 -
UNIVERSE - beginning with gas
clouds. A gas cloud 13 billion
light-years away may be the resting place of some of the earliest stars in the
universe. Astronomers may have just
found the remnants of some of the universe's very first stars.
-
-
3994 - ASTEROIDS
- There is one following us? Our space exploration is just beginning to
learn about the near-Earth asteroids. There are millions of them that orbit
with us around the Sun. Maybe we should
begin tracking their trajectories and predicting any collisions. Then what?
-
- 3995
- EARTH -
mysteries remain? - Many
riddles still remain when it comes to our planet. Here are some of Earth's
biggest unsolved mysteries.
-
-
3996 - SUPERNOVA
- they keep getting bigger? Astronomers have found a blast lasting for
three years and is over ten times as powerful as the brightest supernova . What is it?
-
-
3997 - FORCES OF NATURE - are
they one force? Are the Natural Forces combined into a single equivalency? The forces of nature, we take for granted
in our natural world. They may have come
from a single universal force. And, they may not be forces at all but a warped
geometry in space and time.
-
- 3998
- LISA -
gravity wave observatory? The first-time detection of Gravitational
Waves (GW) by researchers at the Laser Interferometer Gravitational-wave
Observatory (LIGO) in 2015 triggered a revolution in astronomy. This phenomenon
consists of ripples in spacetime caused by the merger of massive objects and
was predicted a century prior by Einstein’s Theory of General Relativity
-
- 3999
- GALAXIES - Farthest galaxies? A monstrous cluster of galaxies lurks at the
heart of this Hubble Space Telescope image. The Hubble Space Telescope gazes into
the lair of a monstrous cluster of galaxies located nine billion light-years
away in the constellation Draco.
-
April 9, 2023 Index of Reviews 3951 to 3999 3999
----------------------------------------------------------------------------------------
-----
Comments appreciated and Pass it on to whomever is interested. ---
--- Some
reviews are at: -------------- http://jdetrick.blogspot.com -----
-- email
feedback, corrections, request for copies or Index of all reviews
---
to: ------ jamesdetrick@comcast.net ------
“Jim Detrick” -----------
--------------------- --- Sunday, May 14, 2023
---------------------------
No comments:
Post a Comment