A new study shows our planet is much closer to the supermassive black hole at the galaxy's center than previously estimated.
Arrows on this map show position and velocity data for the 224 objects utilized to model the Milky Way Galaxy. The solid black lines point to the positions of the spiral arms of the Galaxy. Colors reflect groups of objects that are part of the same arm, while the background is a simulation image.
A new study found similarities between the human brain and the cosmic network of galaxies.
- A new study finds similarities between the structures and processes of the human brain and the cosmic web.
- The research was carried out by an astrophysicist and a neurosurgeon.
- The two systems are vastly different in size but resemble each other in several key areas.
Section of the human brain (left) and a simulated section of the cosmos (right).
Credit: University of Bologna
Michio Kaku: Consciousness Can be Quantified | Big Think<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="cffa17161bfc4dd6dbee720749452fdc"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/0GS2rxROcPo?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span><p><em>"Believe it or not, sitting on our shoulders is the most complex object that Mother Nature has created in the known universe. </em><em>You have to go at least 24 trillion miles to the nearest star to find a planet that may have life and may have intelligence. And yet our brain only consumes about 20-30 watts of power and yet it performs calculations better than any large supercomputer." </em>- Michio Kaku</p>
A team of astrophysicists used AI to figure out which clusters of stars merged to become our galaxy.
- Scientists use artificial intelligence to reconstruct the globular clusters that merged to form our Milky Way galaxy.
- The researchers ran simulations on a neural network to discover the history and details about our galactic ancestors.
- They found that a collision with a previous galaxy called "Kraken" was so powerful it transformed the Milky Way.
Check out how E-MOSAICS simulations shows the formation of a galaxy like the Milky Way:<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="9501816f4e3f2dea501e300adccb7ab3"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/v-v5bSnDZs8?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Credit: D. Kruijssen / Heidelberg University<p><em>Galaxy merger tree of the Milky Way. The main progenitor of the Milky Way is shown by the trunk of the tree, with color representing its stellar mass. Black lines show the five identified satellites. Grey dotted lines demonstrate other mergers that the Milky Way likely underwent, but could not be connected to a particular progenitor. From left to right, the six images at the top list the identified progenitor galaxies: Sagittarius, Sequoia, Kraken, the Milky Way's Main progenitor, the progenitor of the Helmi streams, and Gaia-Enceladus-Sausage.</em></p>
Celebrate Science Day 2020 by proving the Earth is not flat.
- Flat-Earthers drive rational people nuts.
- A physicist offers three experiments to confirm it is those people who are crazy, not you.
- The experiments, however, do require a belief in mathematics.
Experiment 1: Catch a sunset twice<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDc2ODQxMC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY1Mjk0Mzg5NX0.VR2LnQx4TKhyTwmSoZSkDfsOMgqac4d6Drm49vyYCGA/img.jpg?width=980" id="64198" class="rm-shortcode" data-rm-shortcode-id="294982a49a33773d038f756f7227b37d" data-rm-shortcode-name="rebelmouse-image" />
Credit: Johannes Plenio/Unsplash<p>At the top of the calculator is the "Select an experiment" drop-down menu. Let's start with the "<a href="https://www.omnicalculator.com/physics/flat-vs-round-earth#sunset-twice-experiment" target="_blank">sunset twice</a>" experiment.</p><p>Wooding notes that you can prove the Earth is round by standing up quickly right after the Sun goes down and getting ahead of the shadow cast by the horizon so you can see the sun set a second time. If the planet were flat, once it went over the edge from your first viewing position it would be gone.</p><p>You may want to find out the time of sunset before testing out the calculator. There are many places online to find this information. <a href="https://www.timeanddate.com/sun/" target="_blank">Here's one</a>.</p><p>To use the calculator, begin by selecting a city in your time zone. Wooding has pre-entered the sunset duration for you, though you can look up the precise value online for your location.</p><p>There are three ways to increase your height, selected from the "Ideas" menu: standing up from a lying down position, taking the sky-lift elevator at the <a href="https://en.wikipedia.org/wiki/Burj_Khalifa" target="_blank" rel="noopener noreferrer">Burj Khalifa Hotel</a> in Dubai, or sending up a drone with a camera on it. Most of us will select the first option.</p><p>Next, you enter your starting height (the default for lying down is .6562 feet), how long it will take you to stand up, and then the final standing elevation, presumably of your eyes.</p><p>What the calculator finds for you is the percentage of the second sunset you'll see. Note that for the sky-lift and drone tests, you see a lot more of that second sunset given the greater height and your accelerated ascent speed.</p>
Experiment 2: Disappearing object<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDc2ODQxMy9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0MDIzOTU5MX0.NUrgcREKhtrD4TfGtDTDB7_WuCbYTreoXSTnWCsE3Mw/img.jpg?width=980" id="fdac5" class="rm-shortcode" data-rm-shortcode-id="d6fd8797e0bffb64f96d6104e04d09c4" data-rm-shortcode-name="rebelmouse-image" />
Credit: Michael Olsen/Unsplash<p>Thanks to the curvature of the Earth, you can make an object on a distant lake shore seem to <a href="https://www.omnicalculator.com/physics/flat-vs-round-earth#disappearing-object-experiment" target="_blank">disappear</a> with a change in viewing height.</p><p>You'll need binoculars for this one. And, um, a lake.</p><p>The calculator will tell you how much of the object will become unobservable after you fill in the three values.</p><p>(You may also need a boat to measure the distance.)</p>
Experiment 3: Stick shadows<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDc2ODQyMS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0NTM2MTg0Nn0.eyqFl7ulLoMf8UvNYXoPrZ3vcLwyygaM9QJ70EjD9NI/img.jpg?width=980" id="3d767" class="rm-shortcode" data-rm-shortcode-id="2ba382e4212a5f7a8ad4e58dba4e38b1" data-rm-shortcode-name="rebelmouse-image" />
Credit: Logan Radinovich/Unsplash<p><a href="https://www.omnicalculator.com/physics/flat-vs-round-earth#instructions-for-measuring-how-big-the-earth-is-using-stick-shadows" target="_blank">For this one</a> you'll need a cooperative friend who lives at least some distance away, or a teleporter. Also two sticks and a day with enough sunlight to cast shadows in both locations.</p><p>This experiment involves measuring shadows cast at two different locations and calculating the angle between them to arrive at the Earth's circumference.</p><p>This experiment is a little advanced mathematically, and Wooding offers a help link if you're confused.</p>
New research explains why the Moon's crust is magnetized by debunking one long-standing theory.