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Keyword: comet

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  • Signs in the Stars (11-2020)

    11/12/2020 5:58:03 PM PST · by Orlando · 9 replies
    youtube ^ | 11-12-2020 | VetFather
    Sometime comets are viewed as signs and omen...Some of you might find this interesting concerning the signs in the stars...
  • Cometary Activity Spotted on Distant Centaur

    10/29/2020 5:34:55 PM PDT · by BenLurkin · 23 replies
    Sci-News ^ | 10/29/2020
    Centaurs are minor planets thought to have originated in the outer region of our Solar System known as the Kuiper Belt. Active centaurs enigmatically display prominent comet-like features such as comae or tails even though they orbit in the gas giant region where it is too cold for water to readily sublimate. Only 18 active centaurs have been identified since 1927 and, consequently, the underlying activity mechanisms are still poorly understood. 2014 OG392 orbits between 10 and 15 AU (astronomical units) where its equilibrium temperature would be around minus 213 degrees Celsius (minus 351 degrees Fahrenheit). Chandler and colleagues initially...
  • A Rare Hybrid of a Comet And an Asteroid Is Showing Off Its Cometary Traits

    11/02/2020 11:11:00 AM PST · by Red Badger · 4 replies
    www.sciencealert.com ^ | 1 NOVEMBER 2020 | DAVID NIELD
    This image highlights the bright coma of C/2014 OG392 (PANSTARRS). (Northern Arizona University ======================================================================= Centaurs are rare celestial objects that can combine some of the different features of asteroids and comets. They're basically rocky in nature, like asteroids, but can also throw out clouds of dust and gas as their exteriors vaporize, like comets. When centaurs emit these gases, they're considered active. We've only ever found 18 chemically active centaurs in the last century or so, but now a new one has been added to the list – and it might be able to tell us more about how these...
  • Superbolide changes night into day over Brazil (video)

    10/03/2020 5:32:20 PM PDT · by Roman_War_Criminal · 28 replies
    ss ^ | 10/03/20 | ss
    A superbolide was recorded flying over the states of Rio Grande do Sul and Santa Catarina, Brazil on October 1, 2020. Trajectory Preliminary analyses show that the very bright fireball began to shine at about 89.5 km over the rural area to the east of Caxias do Sul and travelled north, at 16.9 km/s (60,900 km/h) at an entrance angle of 44° to the ground The bight meteor disintegrated during 6 seconds, easily overcoming the full moon’s brightness and finally exploded at an altitude of 22 km over the city of Vacaria, also in Rio Grande do Sul state. A...
  • RV-size asteroid to get closer to Earth than the moon

    09/22/2020 6:54:35 PM PDT · by BenLurkin · 46 replies
    live Science ^ | 09/22/2020 | Laura Geggel
    Scientists have yet to pin down the asteroid's exact size, but it's not that large, likely between 14 feet and 32 feet (4.4 and 9.9 meters) long, according to CNEOS. This potentially RV-size asteroid was discovered only last week, on Sept. 18, by the Mount Lemmon Survey in Arizona, and announced the next day by the Minor Planet Center, a NASA-funded group that monitors minor planets, comets and natural satellites. (It's not unusual to find unknown asteroids; in September alone, the Minor Planet Center has announced the discovery of 244 near-Earth objects.) Passing by Earth will actually be a life-changing...
  • The moon is rusting, and Earth is to blame

    09/03/2020 3:49:00 PM PDT · by BenLurkin · 22 replies
    CNET ^ | Sept. 2, 2020 6:36 p.m. PT | Mark Serrels
    So why does rust currently exist on the moon? There are a number of factors, but Earth is partly to blame. To begin with, water exists on the moon in small quantities. Ice water exists in lunar craters, but that water exists on the far side of the moon, far from where the rust occurred. The current theory is that dust particles that often hit the moon are helping release water molecules, mixing those water molecules with iron on the surface. Then there's the oxygen part. That's where Earth comes in. Thanks to the fact it exists in such close...
  • Spellbinding image captures rare comet, northern lights, Milky Way, and bioluminescence

    08/23/2020 11:36:10 AM PDT · by Diana in Wisconsin · 8 replies
    The Hearty Soul.com ^ | August 10, 2020 | Julie Hambleton
    It is said that a picture is worth a thousand words, but sometimes they instead leave you speechless. This is the case with this spellbinding image captured by a B.C. photographer of a rare comet, the Northern Lights, Milky Way, and bioluminescence. Check out the incredible rare beauty captured in this photo. Spellbinding Image Captures Four Rare Sights in One Snapping a gorgeous image of just one of these incredible occurrences is impressive. A photo that contains all four? Absolutely incredible. British Columbia-based landscape and night sky photographer David McColm went out in late July to attempt to capture one...
  • How to see Comet NEOWISE

    07/20/2020 5:21:11 AM PDT · by Red Badger · 17 replies
    Earth & Sky ^ | July 20, 2020 | by Eddie Irizarry
    Comet C/2020 F3 (NEOWISE) is becoming increasingly tough before sunup. It’s magnificent now, through binoculars, in the northwest each evening. Easiest to see from northerly latitudes. Coming into view from further south. Not visible from the Southern Hemisphere. Charts and more info here. Location of Comet NEOWISE from July 20 to 26. Face northwest, just after sunset. Avoid trees or buildings to have a clear view of the northwest horizon. Sweep with your binoculars around the location for the comet marked on this chart. Some might barely see the comet with the unaided eye. So far, evening views have been...
  • Comet NEOWISE over the Swiss Alps (Astronomy Picture of the Day)

    07/15/2020 5:05:51 PM PDT · by MtnClimber · 25 replies
    APOD.NASA ^ | 15 Jul, 2020 | Philipp Salzgeber, foto-webcam.eu; Text: Adam Block
    (Comet week continues) Explanation: Comet NEOWISE has been wowing photographers around much of the world during dawn and dusk, at the margins of day and night. For the most northern residents of planet Earth, however, the comet circles the North Star and never sets. The night part of this circular arc is apparent in the featured composite of images assembled from a webcam located at a ski resort in the Swiss Alps. Images were selected at 30-minute intervals throughout the night from July 12th -13th. Comet NEOWISE (C/2020 F3) will continue to become more accessible to northern hemisphere observers as...
  • The Tails of Comet NEOWISE (Astronomy Picture of the Day)

    07/11/2020 3:49:37 PM PDT · by MtnClimber · 7 replies
    APOD.NASA ^ | 11 Jul, 2020 | Miloslav Druckmuller (Brno University of Technology)
    Explanation: Comet NEOWISE (C/2020 F3) is now sweeping through northern skies. Its developing tails stretch some six degrees across this telescopic field of view, recorded from Brno, Czech Republic before daybreak on July 10. Pushed out by the pressure of sunlight itself, the comet's broad, yellowish dust tail is easiest to see. But the image also captures a fainter, more bluish tail too, separate from the reflective comet dust. The fainter tail is an ion tail, formed as ions from the cometary coma are dragged outward by magnetic fields in the solar wind and fluoresce in the sunlight. In this...
  • Comet Neowise can be seen early evening starting tomorrow 7/12/2020. Directions included.

    07/11/2020 1:05:49 PM PDT · by dragnet2 · 21 replies
    http://www.freerepublic.com ^ | 7/11/2020 | dragnet2
    Up until now, you had to get up at about 4:00 a.m. to view Comet Neowise. Weather permitting, now starting Sunday, July 12, 2020 it can been seen on the lower northwestern horizon during/after evening twilight. Where to look? It's going to be about 5 degrees above the north/northwestern horizon starting Sunday evening at about twilight. To determine what 5 degrees are, keep reading. Hold your hand at arm’s length and close one eye, make a fist, with the back of your hand facing you. The width of your fist will approximately be 10 degrees. 5 degrees are about three...
  • Comet NEOWISE from the ISS (Astronomy Picture of the Day)

    07/10/2020 7:54:27 PM PDT · by MtnClimber · 14 replies
    APOD.NASA ^ | 10 Jul, 2020 | NASA, ISS
    Explanation: Rounding the Sun on July 3rd and currently headed for the outer Solar System, Comet NEOWISE (C/2020 F3) has been growing brighter in the predawn skies of planet Earth. From low Earth orbit it also rises before the Sun, captured above the approaching glow along the eastern horizon in this snapshot from the International Space Station on July 5. Venus, now Earth's morning star is the brilliant celestial beacon on the right in the field of view. Above Venus you can spot the sister stars of the more compact Pleiades cluster. Earthbound skygazers can spot this comet with the...
  • Third time the charm: How to spot Comet NEOWISE gracing our skies this month

    07/06/2020 6:08:01 PM PDT · by BenLurkin · 13 replies
    KOMO ^ | July 6th 2020 | Scott Sistek
    Comet NEOWISE is dimly visible in the early morning skies as the sun begins to rise. The comet was discovered in late March and made its closest approach to the sun on Friday as it spins around our star, according to EarthSky, and now begins its return journey out to deep space. It's the third comet to tantalize astronomers with a potential nighttime show this year, only to see the first two comets that showed promise instead burn up on their approach to the sun. But this third time appears to be the charm with NEOWISE. It's a bit tricky...
  • Death from above? Fireball may have destroyed ancient Syrian village

    06/21/2020 9:53:35 AM PDT · by BenLurkin · 52 replies
    Live Science ^ | 20 June 2020 | Nola Taylor Redd
    13,000 years ago, something very bad seems to have occurred, leaving a layer of carbon suggesting dramatic fires. But for much of the last decade, scientists inspecting the remnants of the village have debated what happened, unable to decide whether the carbon formed during an airburst or during more mundane fires among the thatched huts. So Moore decided to reexamine the glass in more detail. His analysis of the glass composition matched a 2012 finding claiming an airburst had destroyed Abu Hureyra, suggesting that the villagers' bucolic lifestyle ended suddenly when one or more fragments from a passing comet exploded...
  • Stargazing: Comet Swan is coming to town

    05/12/2020 7:48:41 AM PDT · by BenLurkin · 13 replies
    post-gazette.com ^ | 05/12/2020 | Mike Hennessy
    Enter comet Swan, speeding past Earth before it laps our sun and takes another long, elliptical trip through the outer solar system. Swan last waved at Earth 25 million years ago, when mammals grazed on sprawling grasslands in the Oligocene Epoch. Now, this sun-tinged cosmic snowball may illuminate our early morning sky this month. Swan was discovered by Michael Mattiazzo, an Australian amateur astronomer who analyzed images from the Solar and Heliospheric Observatory spacecraft that observes our sun. Swan is outgassing hydrogen from water-ice on its toasty approach to the sun. This hydrogen “burp” shows up in ultraviolet images from...
  • The Ion Tail of New Comet SWAN

    05/02/2020 9:09:02 AM PDT · by MtnClimber · 17 replies
    NASA.gov ^ | 29 Apr, 2020 | Gerald Rhemann (image)
    Newly discovered Comet SWAN has already developed an impressive tail. The comet came in from the outer Solar System and has just passed inside the orbit of the Earth. Officially designated C/2020 F8 (SWAN), this outgassing interplanetary iceberg will pass its closest to the Earth on May 13, and closest to the Sun on May 27. The comet was first noticed in late March by an astronomy enthusiast looking through images taken by ESA's and NASA's Sun-orbiting SOHO spacecraft, and is named for this spacecraft's Solar Wind Anisotropies (SWAN) camera. The featured image, taken from the dark skies in Namibia...
  • It Came From Outside Our Solar System and Now It’s Breaking Up

    04/08/2020 10:47:25 PM PDT · by LibWhacker · 7 replies
    NYTimes ^ | 4/7/20 | Joshua Sokol
    It came from beyond our solar system. But the sun wasn’t content to let it leave in peace, or in one piece. Comet 2I/Borisov, an Eiffel Tower-sized clod of dust and ice, plunged into our solar system last fall, exhaling vapor as it buzzed nearest to our sun around Christmas. This alien visitor must have formed around a distant and unknown star. It slumbered as it crossed the frozen gulf of interstellar space. But now, suddenly, the sleeper is awake and kicking. To the simultaneous delight and frustration of the world’s astronomers, Borisov has sloughed off at least one fragment...
  • Brightening comet looks set to delight astronomers in May

    03/18/2020 4:10:11 PM PDT · by LibWhacker · 20 replies
    Skymania ^ | 3/16/20 | Paul Sutherland
    A comet is currently brightening faster than expected, giving hope that it will become a prominent object visible with the unaided eye in May. An image of Comet C/2019 ATLAS taken from Walmer, Kent, UK, on March 12th, 2020. Image credit: Paul Sutherland The celestial visitor is labelled C/2019 Y4 ATLAS, indicating that it was discovered in 2019 by a sky survey called the Asteroid Terrestrial-impact Last Alert System (ATLAS). This robotic survey, based in Hawaii, searches for small objects to help defend Earth against possible future impacts, and has found several comets as well as asteroids. Comet C/2019 Y4...
  • Ancient human settlement was obliterated by a COMET that exploded in Earth's atmosphere and sent fragments of molten glass 'hot enough to melt cars' flying to the ground 12,800 years ago

    03/10/2020 10:32:32 AM PDT · by BenLurkin · 83 replies
    DailyMail ^ | 10 March 2020 | Ian Randall
    The event destroyed a village found in the Abu Hureyra dig site in Syria... The impact is also believed to have contributed to the extinction of many large animals, including mammoths as well as North American horses and camels. Experts believe the explosion helped bring about the demise of the North American Clovis culture and usher in an episode of climatic cooling. The Abu Hureyra site is located on the edge of a vast region known as the Younger Dryas Boundary (YDB) strewnfield, which incorporates around 30 sites across Europe, the Americas and parts of the Middle East. The strewnfield...
  • Interstellar Comet Borisov Shines in Incredible New Hubble Photos

    12/15/2019 7:06:15 AM PST · by BenLurkin · 12 replies
    Space.com ^ | 12/14/2019 | Chelsea Gohd
    In the first of these new images, taken on Nov. 16, the comet was approximately 203 million miles from Earth, seen in front of a distant spiral galaxy known as 2MASX J10500165-0152029, according to a NASA statement. You can see the comet's tail of dust up to the right. You can also see that the object's bright core looks smudged, as Hubble was imaging the object while also tracking its movement. In both images, 2I/Borisov has been artificially colored blue so that details can be seen in the coma, or envelope of dust and material that surrounds the comet's core,...