• Astronomy Tonight

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Astronomy Tonight

De: QP-4
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  • Astronomy Tonight: Your Daily Dose of Celestial Wonders


    Welcome to "Astronomy Tonight," your go-to podcast for daily astronomy tidbits. Every evening, we explore the mysteries of the night sky, from the latest discoveries in our solar system to the farthest reaches of the universe. Whether you're an amateur stargazer or a seasoned astronomer, our bite-sized episodes are designed to educate and inspire. Tune in for captivating stories about stars, planets, galaxies, and cosmic phenomena, all explained in an easy-to-understand format. Don't miss out on your nightly journey through the cosmos—subscribe to "Astronomy Tonight" and let the stars guide your curiosity!

    For more https://www.quietperiodplease.com/
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Episodios
  • Astronomy Tonight for - 07-19-2024

    Astronomy Tonight for - 07-19-2024
    Jul 19 2024
    On July 19, 1846, a significant event occurred in the field of astronomy. On this day, the first known moon of Neptune, Triton, was discovered by English astronomer William Lassell, just 17 days after the discovery of Neptune itself.

    Triton is quite an unusual moon, and its discovery was a thrilling moment in the history of astronomy. It is the only large moon in our solar system that orbits its planet in the opposite direction to the planet's rotation, which is known as a retrograde orbit. This suggests that Triton may have once been a dwarf planet that was captured by Neptune's gravity.

    Triton is also one of the coldest known objects in our solar system, with surface temperatures reaching as low as -235°C (-391°F). Despite this extreme cold, Triton is geologically active. The Voyager 2 spacecraft, during its flyby in 1989, observed geyser-like eruptions spewing nitrogen gas and dust particles several kilometers into space. This makes Triton one of the few geologically active moons in our solar system.

    The discovery of Triton opened up a new chapter in our understanding of the outer solar system and the diversity of moons that exist around the giant planets. It also sparked curiosity about the potential for life in extreme environments, as Triton's subsurface ocean and geological activity make it a fascinating candidate for astrobiological studies.

    So, on this day in 1846, William Lassell's keen observations led to the discovery of a truly unique and captivating world, adding another piece to the cosmic puzzle that astronomers continue to explore to this day.
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  • Astronomy Tonight for - 07-18-2024

    Astronomy Tonight for - 07-18-2024
    Jul 18 2024
    On July 18, 1962, a significant event in the history of astronomy took place: the launch of the Mariner 1 spacecraft by NASA. This mission was intended to be the first interplanetary flyby of Venus, marking a major milestone in our exploration of the solar system.

    However, the mission took an unexpected turn mere minutes after launch. The rocket carrying Mariner 1 veered off course due to a software error in the guidance system. The error, later traced to a missing hyphen in the code, caused the rocket to fiercely pitch over, threatening to crash back to Earth.

    Sensing the imminent danger, the Range Safety Officer took decisive action and pressed the self-destruct button, causing the rocket to explode just 293 seconds after liftoff. Debris rained down into the Atlantic Ocean, and the spacecraft was lost.

    The Mariner 1 incident became known as "the most expensive hyphen in history," as the missing punctuation mark led to the loss of a $18.5 million spacecraft (roughly $165 million in today's dollars). It also served as a stark reminder of the importance of thorough testing and quality control in the space industry.

    Despite this setback, NASA persevered. Less than a month later, on August 27, 1962, Mariner 2 was successfully launched, becoming the first spacecraft to flyby another planet when it passed Venus on December 14, 1962. This flyby provided valuable data about Venus and paved the way for future interplanetary missions.

    The Mariner 1 incident, while a costly failure, taught valuable lessons and ultimately contributed to the success of the American space program. It's a testament to the challenges and triumphs of space exploration, and a reminder that even the smallest details, like a missing hyphen, can have far-reaching consequences in the grand endeavor of understanding our universe.
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  • 07-18-2024 - comet Shoemaker-Levy 9

    07-18-2024 - comet Shoemaker-Levy 9
    Jul 18 2024
    On July 18, 1994, the comet Shoemaker-Levy 9 made a spectacular series of collisions with the gas giant Jupiter, providing astronomers with a once-in-a-lifetime opportunity to witness a cosmic cataclysm up close.

    The comet, discovered just a year earlier by astronomers Carolyn and Eugene Shoemaker and David Levy, had been torn apart by Jupiter's immense gravitational pull during a previous close encounter with the planet. The result was a string of comet fragments, each up to 2 kilometers in diameter, lined up like pearls on a celestial string.

    As the fateful day approached, astronomers around the world trained their telescopes on Jupiter, eager to witness the cosmic fireworks display. The Hubble Space Telescope, along with other orbiting observatories and ground-based telescopes, had a front-row seat to the event.

    The first impact occurred at 20:13 UTC, with fragment A slamming into Jupiter's southern hemisphere at a speed of approximately 60 kilometers per second. The resulting explosion was estimated to have released energy equivalent to 300,000 megatons of TNT, making it 600 times more powerful than Earth's entire nuclear arsenal.

    Over the next six days, more than 20 fragments crashed into Jupiter, each creating a brilliant flash of light and leaving massive, dark scars in the planet's atmosphere. The largest of these scars was estimated to be around 12,000 kilometers in diameter, roughly the size of Earth.

    The impacts provided invaluable data for astronomers studying Jupiter's composition and atmospheric dynamics. They also served as a stark reminder of the potential danger posed by comets and asteroids to Earth, underscoring the importance of monitoring these celestial bodies and developing strategies to mitigate the risk of a potential impact.

    The Shoemaker-Levy 9 impacts were a testament to the unpredictable and awe-inspiring nature of the cosmos, and they will forever be remembered as one of the most significant astronomical events of the 20th century.
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