Wednesday, November 6, 2024
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When a planet passes in front of a star, the starlight passes through the planet's atmosphere. Lines in the resulting spectrum occur where different elements absorb light at characteristic energies, indicating the composition of the planet's atmosphere.
Wednesday, October 30, 2024
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The chance for a spooky Halloween comet sighting will not happen. The comet known as C/2024 S1 didn’t survive it’s rendezvous with the sun, as it broke apart at parahelion.
Wednesday, October 23, 2024
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Wednesday, October 16, 2024
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For those in the Northern hemisphere, the next weeks are our best chance to see Comet A3, which came from the Oort Cloud, and won’t be back for 80,000 years
Wednesday, October 9, 2024
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The constellations Carina, Vela, and Puppis make up Argo Navis, the mythical ship. Argo Navis was one of the 48 constellations listed in the Almagest.
Wednesday, October 2, 2024
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A 13 year survey conducted by the VISTA telescope has created the most detailed map of the Milky Way ever. It contains an incredible 1.5 billion objects
Wednesday, September 25, 2024
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The observable universe is the spherical region around Earth from which light has had time to reach us since the universe began. The boundary is called the cosmic light horizon.
Wednesday, September 18, 2024
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Researchers have found evidence suggesting the Earth may have had a ring system 466 million years ago
Wednesday, September 11, 2024
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The far-southern constellation Tucana is to be found at the end of the celestial river, Eridanus. It represents the large-beaked tropical bird that is native to South and Central America.
Wednesday, September 4, 2024
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Astronomers discovered a new “Odd Radio Circle” (a mysterious ring invisible at all wavelengths except radio) near the center of our galaxy. I hope it’s playing space rock.
Wednesday, August 28, 2024
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In 1610, Galileo's telescope revealed that the milky smear across the night sky is not a nebula but a field of tiny stars. Immanuel Kent guessed that the stars form a rotating disk and that the Earth is inside it.
Wednesday, August 21, 2024
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In 1977 on August 20th, the Voyager 2 spacecraft was launched to visit the outer planets. In Dec. 2018 it passed Neptune and entered interstellar space. Voyager 2 is still transmitting data 47 years later!
Wednesday, August 14, 2024
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A dense ball of 10.5 million stars, Omega Centauri is the biggest and brightest of about 200 globular clusters in the Milky Way galaxy. The average distance between its stars is just one tenth of a light year.
Wednesday, August 7, 2024
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The sun’s corona can be 200 times hotter than the sun’s surface, despite being farther away from the ultimate source of heat at the sun’s core
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Comet Encke was "discovered" in 1786, 1795,1805, and 1818 by different astronomers. These comets were found to be the same only after orbital calculations in 1819 by the German astronomer Johann Encke, who then predicted its return in 1822.
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A new look at how light bends as it travels through the universe could point to an alternative theory of gravity
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Retrograde motion is an effect of changing perspective. Inferior planets Mercury and Venus show retrograde motion on either side of inferior conjunction. They "overtake" Earth as they pass between Earth and the Sun.
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Supermassive black hole winds blowing at 36 million mph can sculpt entire galaxies
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First discovered in 1826, the Bug Nebula is one of the brightest planetary nebulae. The central star is thought to have an extremely high temperature, and its intense heat lights up the surrounding stellar material.
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Some scientists speculate that the universe is shaped like a doughnut, instead of stretching to infinity. It’s a topology that could eventually be mapped.
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RCW 49 is one of the most productive regions of star formation to have been found in the Milky Way. It spans a distance of about 350 light-years, and it is thought that over 2200 stars reside within it.
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New discoveries from the far reaches of space
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Camelopardalis is a dim constellation of the far northern sky, representing a giraffe. The giraffe's long neck can be visualized as stretching around the north celestial pole toward Ursa Minor and Draco.
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The Multiverse could be much much bigger than we ever imagined
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The Horsehead Nebula is lit by a quintuple star system that bathes the clouds in UV light. Sigma Ordonis A and B are an orbiting pair of blue stars; C,D, and E will eventually spin off as solo stars
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Astronomers just discovered WASP-193b, an extremely low-density giant planet orbiting a sun-like star 1200 light-years from Earth. WASP-193b is 50% larger than Jupiter, but 7 times less massive, giving it a density comparable to cotton candy
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NASA has created a visualization of what it would be like to fall into a black hole. It is worth those 40 seconds of your life.
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Exploding Stars, Black Hole Outbursts, Gamma-rays & Dark Matter...
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Albireo is regarded as one of the finest multiple star systems in the night sky. It consists of a golden-colored giant star and a cooler blue-dwarf star. Albireo is easily separated through a small telescope.
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The total solar eclipse was awesome!
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Little is known about dark energy, except that it's repulsive. This strange force causes matter to scatter rather than attract. Dark energy makes up 68% of the universe's mass-energy density.
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The Heliosphere - made of solar wind, solar transients, and the interplanetary magnetic field, acts as our solar system’s personal shield- protecting the planets by absorbing potentially damaging galactic cosmic rays.
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Enaiposha is 3 times bigger and 8 times as massive as Earth. The planet's density means a chunk of it must be lighter than rock but heavier than gas. It is likely that Enaiposha is a water world.
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A star system located 3,000 light-years away called T Coronae Borealis is predicted to go nova between now & Sept. These Outbursts happen approx every 80 years, and can be seen with the naked eye
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3C 273 is the brightest quasar in the sky and the second to be discovered. In 1963, Cyril Hazard used an occultation by the moon to establish its position.
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The Galactic Winds of Change have blown us to 4am - wake up call #1
Wednesday, February 28, 2024
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The Carina Nebula boasts three rare Wolf-Rayets (WR), the hottest stars in the universe. They illuminate and ionize a dark nebula called a Bok globule.
Wednesday, February 21, 2024
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A defunct school bus sized Eurpoean satellite launched in 1995 will crash into the earth’s atmosphere sometime this week - most likely Wednesday morning.
Wednesday, February 14, 2024
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Unusually, Gamma Velorum, a blue star, has been recently renamed. Its new name Regor, "Roger" backwards, honors Roger Chaffee, an astronaut who died in the Apollo 1 fire.
Wednesday, February 7, 2024
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It takes a long time to travel across the universe - here’s some long songs to help pass the time
Wednesday, January 31, 2024
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The Cat's Eye nebula is one of the most complex of all planetary nebulae, possibly due to the interaction of a close binary system at its center.
Wednesday, January 24, 2024
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Analyzing cosmic nothing might explain everything - “empty” areas of the universe called voids could solve the cosmos’ greatest mysteries.
Wednesday, January 17, 2024
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Puppis is a rich southern constellation straddlng the Milky Way that was originally part of the ancient Greek constellation of Argo Navis until it was divided into three parts in the 18th century
Wednesday, January 10, 2024
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First foray into the universe for 2024. I have no fascinating space news to smooth the way.
Wednesday, January 3, 2024
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The distinctive shape of the stunning Hourglass Nebula has fired much debate over its formation among astronomers.
Wednesday, December 27, 2023
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Just a few of my favorite things from 2023
Wednesday, December 20, 2023
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I am too tired to go get the astronomy book off the shelf so everybody gets to make up their own fun space fact this week
Wednesday, December 13, 2023
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The Geminids meteor showers are peaking Dec 13 & 14th in N. America. The Geminids are unusual as the shooting stars are caused by an asteroid, and not a comet. The y appear to emanate from the constellation Gemini in the southern sky.
Wednesday, December 6, 2023
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Wednesday, November 29, 2023
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The Existence of Dark matter in our universe has been confirmed by scientific observations, including recent pictures from the Webb telescope. However, no experimental observation of Dark matter has been reported.
Wednesday, November 22, 2023
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Ensisheim is the oldest meteorite fall that can be positively dated. It was carefully preserved by being hung from the roof of the parish church in Ensisheim, Alsace.
Wednesday, November 15, 2023
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Thanks to everyone who pledged during our fundraiser!
Wednesday, November 8, 2023
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A Cosmic Fundraising Soundtrack
Wednesday, October 25, 2023
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9,000 years ago a Milky Way star exploded in a supernova, leaving behind the Veil Nebula. This nebula is physically huge, containing one filament, NGC 6960, known as the Witch's Broom Nebula, and another, NGC 6995, known as The Bat Nebula.
Wednesday, October 18, 2023
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The Milky Way is warped. Our galaxy’s wobbly disc might be the result of a tilted halo of the universe’s mysterious dark matter. Or the cause might be the psych/space-rock radio waves of Space is Deep.
Wednesday, October 11, 2023
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LDN 43 is a nebula which bears an astonishing resemblance to a vast cosmic bat flying amongst the stars on a dark Halloween night. In the constellation Ophiuchus, this molecular cloud is dense enough to block light from background stars.
