This Thursday, October 20th, is International Shakeout Day, and various organizations, including schools and colleges, are holding earthquake drills to ‘drop, cover, hold on’, which is much better than standing in a doorway and running outside. Emphasize technique. , or the fake “triangle of life” technique.
However, most schools (including BC) schedule fire drills right after earthquake drills, so students evacuate outdoors for fire drills, contrary to what we should do for an earthquake. will be
Anyway, the William M. Thomas Planetarium will be showing “Earthquakes: Evidence for a Restless Planet” on Thursday night. Starting with an evening sky tour, use the dome to look below the Earth’s surface to see how the Earth moves underfoot due to the action of plate her tectonics.
Two weeks later, on November 3rd, we’ll be showing “From Dream to Discovery: Inside NASA.” Tickets for both shows are still available through Vallitix.
meteor clock
Thursday night is the peak of the Orionid meteor shower. The reason Orion is active from her September 26th to her November 22nd is that her trail of dust left by Comet Halley, the cause of the shower, is fairly wide.
As the comet approaches the Sun, the water, carbon dioxide, carbon monoxide, methane, and ammonia ice-embedded rock and dust particles are released into space as the ice sublimates.
Whether rock and dust are ejected in explosive jets or more gently, the result is a trail of dust in the comet’s orbit. When the comet’s orbit intersects the Earth’s orbit, we encounter dust trails and see streaks of light coming from specific directions as the comet’s debris evaporates in the atmosphere far from the Earth’s surface. To do.
Orion is moving through the atmosphere at a speed of 41 miles per second. Thank you for having an atmosphere that protects us! On peak nights, you should see 10-20 meteors per hour.
Radiant, the direction from which meteors appear to come, is in the upper left corner of Orion’s boundary, where the faint star of the club held in Orion’s right hand can be found.
A line connecting the bright red star Betelgeuse in the upper left corner of the main part of Orion, visible from anywhere in Bakersfield, and the brighter orange-red Mars, just half a fist above Betelgeuse, is the Orion constellation. The glow is in the middle of them, to the left of the line.
The radiation rises several hours before the moon rises. This year, the moon is a waning crescent, only 21% lit, and the moon rises from the east around 3:15 a.m. on Friday at around 3:30.
Two other meteor showers that increase slightly in late October/early November are Taurus South and Taurus North from Comet Encke.
There are some mountains in southern Taurus, but they never produce more than 5 meteors per hour. Flashing across the sky, however, is a larger, highly visible fireball.
Taurus of the North also produces fireballs, with an even more notable fireball every seven years. The last notable year was his 2015, seven years before him, so this should be a good year. Taurus North peaks in his second week of November, when the Moon becomes almost completely waxing.
Speaking of fireballs, one was recently captured over Canada by hundreds of security and dashboard cameras. The Global Fireball Observatory and orbiting satellite traced the path to the Oort Cloud.
What’s remarkable about this fireball is that it looks more like an asteroid fragment than a comet fragment. The Oort Cloud is a spherical cloud of comets extending to about one-third to one-half the distance to the nearest star.
thought to be made Dirty icebergs, which we call comets, may have formed clouds earliest solar system The giant planet shoots trillions of comets randomly through gravity, building a spherical cloud of comets.
Another 1979 fireball, despite being a rocky asteroid, shared many of the same features as orbits coming from the Oort Cloud.
Only two rocky asteroid fireballs coming from the Oort cloud have been observed so far, so models of the formation of the solar system can be modeled so that external giant planets can fly asteroids as well as comets. It’s hard to say how much you need to adjust. to the outer edge of the solar system. However, it shows that the formation of the solar system was more disorderly than originally thought. We need to learn more about why research science is so interesting and valuable.
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