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-2595 - ASTEROID - Teacher’s Lesson Plan. The fastest spinning asteroid was discovered by an amateur astronomer, but using a professional telescope by remote control. This just became available to all teachers who want to teach some astronomy using the internet.
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- 2596 - EINSTEIN - has theories of the Universe? The basic principles of general relativity can be stated quite simply: The presence of matter distorts the fabric of space and time, and objects travel on the shortest path in that distorted space-time universe. Getting to this conclusion is another story.
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- 2597 - BIG BANG - how it all started ? Way before the Garden of Eden. When the whole Universe was compressed into the size of an atom. Where it all started at the beginning of the first universe expansion. Believe it or not there are scientists trying to define how it all happened.
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- 2598 - SUN - from our latest satellites? A new spacecraft is journeying to the Sun to snap the first pictures of the Sun's north and south poles. Now, we'll be able to look down on the Sun from above. The Sun plays a central role in shaping space around us. Its massive magnetic field stretches far beyond Pluto, paving a superhighway for charged solar particles known as the solar wind.
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- 2599 - SUN - End of Humanity? The Sun is 4.6 billion years old. It will live another 5 billion years then its hydrogen will have mostly burned off and the core of the Sun will be solid helium. It will continue burning but it will be twice as hot. Humanity will need to have found another home.
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- 2600 - MAGNETARS - magnetic stars? Magnetism is one manifestation of the electromagnetic force, which is one of the four forces known in the universe. All material that we know of is magnetic at some level. The electrons spin about the atom and the electrons themselves spin so that each atom becomes a tiny atomic magnet. To go from the smallest to the very largest magnetic fields we need to go from atoms to stars.
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- 2601 - ASTRONOMY - extremes noted in 2020? - Stars in the universe range from extraordinary hyper-giants to stars so small they look more like gas giant planets than burning balls of hydrogen. Some stars move so fast they may leave their galaxies entirely, while theoretical stars may exist that stretch the boundaries of known physics.
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- 2602 - PULSAR - spinning Neutron Star? - Pulsars were discovered more than 50 years ago as beacons of stars that have collapsed into dense cores, behaving unlike anything we see on Earth. For decades, scientists have been studying pulsars in the hopes of getting a better understanding of their inner workings.
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- 2603 - UNIVERSE - shape of the Universe? - The shape of the universe is one of the most important questions in cosmology, with far-reaching implications, up to and including the ultimate fate of the universe. Astronomers have been measuring our universe to be geometrically flat, but a team of cosmologists are now reporting that our latest measurements actually prefer something rounder.
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- 2604 - MATH - for fun: Science and Math are special to me. Science is the study of reality. It helps me try to understand what the world is really like. Math is the study of patterns. What is amazing to me is how well math is used to describe nature. Was math discovered in nature, or, was it invented to describe nature. Regardless, it is amazing that it works so perfectly.
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- 2605 - BETELGEUSE - goes supernova? Betelgeuse was once among the 10 brightest stars in the sky, it’s now merely comparable to the brightness of the stars on Orion’s belt, and it continues to dim. Betelgeuse may go supernova today or at any random day over the next 100,000 years or so, but many great many professional and amateur astronomers are hoping to witness the first naked-eye supernova in our galaxy since 1604.
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- 2606 - BETELGEUSE - use temperature to learn size? - To learn how big a star is take its temperature? To rephrase the title how can we calculate a star’s radius from its luminosity? How can we measure how big a star is by how bright it is? Almost all stars are too far away for us to measure their diameters directly.
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- 2607 - HUBBLE CONSTANT - leads to the age of the Universe? Once you figure out that the Universe is expanding, all you need to do is measure the expansion rate today and use the laws of physics to determine how the expansion rate must have changed over time. You do the calculating backwards and go all the way back until you achieve the conditions of the hot Big Bang itself.
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- 2608 - MARS - cosmic rays seen on Mars? NASA is using the ‘InSight lander” to look for meteors on Mars. From a glance at the images, the search seems straightforward. But, the images show mostly ghosts, the invisible made visible and the visible drowned out amid the illusions. Here is a summary of the data from sky watching on Mars.
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- 2609 - LIGHT - how to measure its speed ? One of the most common questions asked is whether gravity is instantaneous, or whether there’s a speed limit to how fast the force of gravity can travel. This is not as simple a question as it seems on the surface. Most would say at the speed of light. However the problem with the speed of light, is it gets here too early in the morning.
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- 2610 - GRAVITY WAVES - measuring the Universes? Using gravity waves and not just electromagnetic waves to study back to the beginning of time. How to explain the universe is flat and the same in every direction astronomers can look. Gravity waves could be a measuring stick
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- 2611 - BIG BANG - energy flows create the Universe? Cosmology - astronomy studying energy flows and the force of statistics. Chaos ensues and stuff happens. Do statistical forces create Nature? Are we just a product of large numbers?
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------------------------- Saturday, February 8, 2020 --------------------------------
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