- 3800 - IINDEX OF ASTRONOMY REVIEWS : This index is of the 50 reviews from 3800 to 3850. Indices of all previous reviews is available upon request.
-
- Writing style is staccato with each paragraph an idea and limited to a few pages in total.
- Comments are always welcome. See https:://jimdetrick@blogspot.net
----------------------------------------------------------------------------
-
- 3800 - MILKY WAY GALAXY - The "poor old heart of the Milky Way"is a population of stars left over from the earliest history of our home galaxy, which resides in our galaxy's
- -
- 3801 - PHYSICS - what is the “standard model”? The Standard Model explains the fundamental physics of how the universe works. It has endured over 50 trips around the sun despite experimental physicists constantly probing for cracks in the model's foundations.
-
- 3802 - ASTEROID BENNU visit in 2020? When OSIRIS-REx touched down on asteroid Bennu in October 2020 to collect a precious sample to carry home to Earth it unleashed an unexpected explosion
-
- 3803 – BLACKHOLE MYSTERIES - much more to learn? By analyzing the evolution of stars in the universe, researchers estimated how often the stars, either on their own or paired into binary systems, would transform into stellar-mass black holes, those with masses 5 to 10 times that of the sun.
-
- 3804 - DARK ENERGY - where dose it come from? DarkEnergy is the energy causing the universe to expand at an ever increasing rate. What could explain the crisis in cosmology?
-
- 3805 - FUNDAMENTAL CONSTANTS - how many are there? Through a variety of tests on Earth and throughout the universe, physicists have measured no changes in “time” or “space” for any of the fundamental constants of nature
-
- 3806 - DARK ENERGY - new theories are needed? In 1916, Einstein finished his Theory of General Relativity, which describes how gravitational forces alter the curvature of spacetime. This theory predicted that the Universe is expanding, which was confirmed by the observations of Edwin Hubble in 1929.
-
- 3807 - WATER - where did Earth's water come from? But water is ubiquitous in protoplanetary disks, and water’s origin may not be so mysterious after all. In other young solar systems there is an abundance water. In solar systems like ours.
-
- 3808 - SOLAR SYSTEM - seven planets. With four inner, rocky planets, four outer, giant planets, and asteroids, moons, and Kuiper belt objects, our Solar System is a complex and wondrous place. Every one of the planets has some surprising and exciting facts.
-
- 3809 - MAGNETIC STAR - X-ray telescopes new discovceries? Launched on December 9, 2021, IXPE is the first satellite that can measure the polarization of X-ray light with this level of sensitivity and clarity. It was designed to discover the secrets of some of the most extreme objects in the universe the remnants of supernova explosions, powerful particle streams spit out by feeding black holes.
-
- 3810 - WATER PLANETS - new discoveries lightyears away? As our instruments and techniques become sensitive enough to find and study planets that are farther from their stars, we might start finding a lot more of these water worlds. Maybe some identical to Earth.
-
- 3811 - SOLAR FLARE - can we predict and protect? To start off 2023 astronomers detected a massive explosion on the far side of the sun, which may have spat out one of the most powerful flares the sun can produce.
-
- 3812 - MERCURY - closest planet to the Sun? Messenger Spacecraft is orbiting Mercury so we can calculate the planet’s mass. On May 26, 2012, the Messenger spacecraft is in orbit. The math to put it in orbit was developed in the 16th century.
-
- 3813 - MERCURY - what spascecraft are learning? Mercury is the closest planet to the Sun and it has suffered the consequences. It is the densest plane made up of mostly rock and metal. Mercury has a diameter of 3,032 miles, which is just slightly larger than our Moon.
-
- 3815 - VOYAGER SPSACECRAFT - Since the 1972 launch of Pioneer 10 we now have five spacecraft that have either reached the edges of our solar system or are fast approaching it: Pioneer 10, Pioneer 11, Voyager 1, Voyager 2 and New Horizons.
-
- 3816 - ATMOSPHERIC RIVERS - bringing us new weather? Atmospheric river is bringing huge amounts of tropical moisture to California, prompting weather forecasters to issue alerts for high risks of flooding.
-
- 3817 - BATTERIES and RADAR - minuturzation is key? CubeSats and miniaturized instruments are likely to become more ubiquitous on deep space missions. While these compact space probes are less well-rounded than their larger counterparts, they offer specialized capabilities at a relatively low cost, making them an ideal supplement to the larger mission
-
- 3818 - ASTEROID 'Oumuamua - how unusual isit? Five years after spotting
asteroid Oumuamua, the first known object from beyond our solar system passing through, scientists are still figuring out what this strange object says about planetary systems
-
- 3819 - RADIO FREQUENCY ASTEROIDS - see what's coming? An experiment to bounce a radio signal off an asteroid on December 27, 2022 will serve as a test for probing a larger asteroid that in 2029 will pass closer to Earth than the many geostationary satellites that orbit our planet.
-
- 3820 - SATURN - a planet you can see with binoculars? Of all the planets visible in the night sky, either with the naked eye or the aid of a powerful telescope, none is more recognizable or iconic than Saturn. With its giant system of rings, Saturn’s appearance is immediately discernible, setting it apart from all the other known planets.
- 3821 - NEUTRON SRARS - what happens when they merge? The magnetar was formed by two neutron stars merging, which has never before been observed. The merger resulted in a brilliant kilonova, the brightest ever seen, whose light finally reached Earth on May 22, 2020. The light first came as a blast of gamma-rays, called a short gamma-ray burst.
- 3822 - MILKY WAY - how did it get its shape? Why does the Milky Way have spiral arms? New Gaia data are helping solve the puzzle. Recently published studies exploring the Early Data Release 3 (EDR3), a batch of observations made available to the scientific community last December, 2022, reveal the spiral structure of our galaxy with a greater precision and detail than was possible before.
-
- 3823 - JAMES WEBB - sees the earliet galaxies? The James Webb Space Telescope (JWST) has spotted several rare red spiral galaxies, giving astronomers a new view of the early universe. Astronomers analyzed these red spiral galaxies in one of the first images of the galaxy cluster.
-
- 3824 - SUN - an unusual star? What you shoiuld know about our Sun. From their earliest beginnings to their final extent before fading away, Sun-like stars will grow from their present size to the size of a red giant (the Earth’s orbit) to up to 5 light-years in diameter. These are called “planetary nebulae”.
- 3825 - EARTH'S WATER - how did it get here? The origin of Earth’s water has been an enduring mystery. There are different hypotheses and theories explaining how the water got here, and lots of evidence supporting them. But, water is ubiquitous in protoplanetary disks, and water’s origin may not be so mysterious after all.
-
- 3826 - EARTH'S - orbit changes around the Sun? On January 4, 2023. Earth will reach its closest point to the sun all year in an annual event called “perihelion”. The precise distance varies from year to year, but -perihelion 2023 will see our planet orbiting 91.4 million miles from the sun, or roughly 3 million miles closer than Earth's “aphelion”, its farthest point from the sun, which will occur on July 6, 2023.
-
- 3827 - EINSTEIN - How he changed the world? Albert Einstein (1879-1955) is one of the most famous scientists of all time, and his name has become almost synonymous with the word "genius." There are many ways Einstein changed the world.
- 3828 - COSMIC RAYS - where do they come from? Cosmic rays produce extensive particle showers that send a cascade of electrons, photons, and muons to Earth's surface.
-
- 3829 - JAMES WEBB - lots of new stuff to learn? There is no one single sensor that can collect data in all of those different wavelengths at the same time. Therefore, scientists have developed a plethora of instruments that are extremely good at collecting data in one specific spectrum, such as radio (ALMA), or mid-range infrared (James Webb).
-
- 3830 - GAMMA RAYS - where and what causes them? Astronomers hope to find evidence for dark matter via observations of other satellite galaxies of the Milky Way; unfortunately, there is a stronger "background" of gamma rays from millisecond pulsars in these systems than previously realized.
-
- 3831 - UNDERGROUND LIFE - or life on other planets? Water trapped below Earth's surface for billions of years could hold keys to unlocking the secrets of extraterrestrial life. Ancient water trapped deep within an Alpine mountain range harbors microbial life that might look quite like that on other planets.
-
- 3832 - WEBB DISCOVERIES - new teachings from Webb. The launch and subsequent operation of the James Webb Space Telescope (Webb or JWST) is one of the most exciting scientific events in decades. When Webb launched on Christmas Day of 2021, it was the culmination of decades of work by NASA scientists and engineers. In mid-July, 2022, Webb released its stunning first images.
-
- 3833 - BLACKHOLES - previously hidden. Astronomers have uncovered more than 400 previously hidden black holes feeding on stars and dust in the center of galaxies. Many of the new black holes, discovered using NASA's “Chandra X-ray Observatory,” remained unknown until now because they are buried beneath cocoons of dust.
-
- 3834 - BLACKHOLES - Do SINGULARITIES exist? The singularity at the center of a black hole is the ultimate no man's land: a place where matter is compressed down to an infinitely tiny point, and all conceptions of time and space completely break down. And if it doesn't really exist something has to replace the singularity.
-
- 3835 - BUCHDAHL STAR - when a blackhole is a star? An elusive object in space has posed a riddle for scientists. It looks like a black hole. It acts like a black hole. It may even smell like a black hole. But it has one crucial difference: It has no event horizon, meaning that you can escape its gravitational clutches if you try hard enough.
-
- 3836 - TARDIGRADES - are near industribule life? We can all rest assured that even if a sequence of devastating events, or one enormous planet-killing disaster, manages to wipe out most species alive today, the tardigrades will still somehow manage to come out on top, ensuring that "life as a whole will go on," .
-
- 3837 - MILKY WAY FACTS - We are still learning? We life on a planet circling the sun. The Sun is a center of solar system of nine planets. Our Sun is only one of billions of stars in the Milky Way galaxy. The Milky Way is a “barred spiral” galaxy around 13,600,000,000 years old with large pivoting arms stretching out across the cosmos.
-
- 3838 - FAST RADIO BURSTS - what can radio waves teach us? For over a decade now, so-called fast radio bursts (FRBs) have been puzzling scientists. These ultra-short-lived, bright flashes of radio waves across the sky happen all day, but no one yet knows what causes them.
-
- 3839 - RADIO ASTRONOMY - probing new distances? The detection of the special radio wavelength from the most distant galaxy means astronomers may be ready to investigate how the earliest stars form. Astronomers have detected a radio signal from the most distant galaxy yet.
-
- 3840 - FAST RADIO BURSTS - what can they tell us? Since 2010, fast radio bursts (FRBs) have been puzzling scientists. These ultra-short-lived, bright flashes of radio waves across the sky happen all day, but no one yet knows what causes them.
-
- 3841 - COSMIC RAYS - where do they come from? - Cosmic rays produce extensive particle showers that send a cascade of electrons, photons, and muons to Earth's surface. They were miss named in the beginning. They are not rays but atomic particles traveling at near light speed.
-
- 3842 - STRANGE ASTEROIDS - in our inner circle? - July 17, 2022, NASA's Dawn spacecraft will rendezvous with the asteroid Vesta. This will be our best look yet at an asteroid, and what the probe digs up could help scientists answer several questions about this and the hundreds of thousands of asteroids that populate the solar system.
-
- 3843 - STRANGE BLACKHOLE - Buchdahl star densest object. - An elusive object in space has posed a riddle for scientists. It looks like a black hole. It acts like a black hole. It may even smell like a black hole. But it has one crucial difference: It has no event horizon, meaning that you can escape its gravitational clutches if you try hard enough.
-
- 3844 - ASTEROID - near miss in January 2023? Asteroid set to make 'extraordinarily close' approach to Earth tonight, Janusry 26, 2023, Thursday, at 4:17 p.m. EST (2117 GMT). A small asteroid will pass close to Earth on Thursday, not to be seen again until 2036.
-
- 3845 - LIGHT - mysteries beyond comprehension? Light is both particle and wave, and it is the fastest thing in the universe. It carries with it the secrets of reality in ways we cannot completely understand. But understanding its duality was an important step for our perplexed minds.
-
- 3846 - GRAVITYWAVES - so weak and powerful. Gavity isn't just a force that keeps things holds us to the ground. General Relativity tells us that gravity makes gravitational waves, or ripples in the fabric of space-time. But, how do these gravitational waves work, exactly?
-
- 3847 - MAX PLANCK - introduces the quantum world? The quantum world is one in which rules that are completely foreign to our everyday experience dictate bizarre behavior. 100 or so physicists at the dawn of the 20th century, were trying to figure out how atoms worked. Little did they know what their courageous, creative thinking would become a few decades later a quantum revolution.
-
- 3848 - PHYSICS - beyond the Standard Model? The Standard Model of Physics explains the fundamental physics of how the universe works. It has endured over 50 trips around the sun despite experimental physicists constantly probing for cracks in the model's foundations.
-
- 3849 - DARK MATTER - mysteries near the Sun? Space probes that fly close to the sun might one day help to reveal the nature of dark matter. Dark matter is the invisible and largely intangible substance that researchers suggest makes up about five-sixths of all matter in the universe.
-
-January 7, 2023 INDEX OF ASTRONOMY REVIEWS 3800
--- -------------------------------------------------------------------------------------
--- -- 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” -----------
--- ------------------ --- Saturday, January 28, 2023 ---------------------------
-
No comments:
Post a Comment