Wednesday, November 6, 2024
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Lisa
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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.
Saturday, November 2, 2024
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Lisa
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Week 3 of waiting for the Tacca bloom to fully open
Saturday, October 26, 2024
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Lisa
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Week 2 of the Tacca Chantrieri about to bloom
Wednesday, October 23, 2024
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Lisa
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Saturday, October 19, 2024
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Lisa
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My Tacca Chantrieri is about to bloom
Saturday, October 12, 2024
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Lisa
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Time for blood on the ice again
Wednesday, October 9, 2024
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Lisa
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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.
Saturday, October 5, 2024
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Lisa
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Friendly reminder that the common cold never went away
Saturday, September 28, 2024
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Lisa
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The plants in the garden that are still alive are looking great
Wednesday, September 25, 2024
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Lisa
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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.
Saturday, September 21, 2024
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Lisa
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First rain in 6 weeks makes sure to arrive just in time for Arlington Town Day
Saturday, September 14, 2024
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Lisa
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Entering week 6 without rain in garden
Wednesday, September 11, 2024
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Lisa
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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.
Saturday, September 7, 2024
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Lisa
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I got nothing today
Saturday, August 31, 2024
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Lisa
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Getting ready to shelve the white accessories for the season
Wednesday, August 28, 2024
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Lisa
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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.
Saturday, August 24, 2024
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DJ:
Lisa
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It's dark at 7pm now
Saturday, August 17, 2024
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Lisa
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I saw neither meteors nor auroras from my yard. I'd like to speak with the manager.
Wednesday, August 14, 2024
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DJ:
Lisa
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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.
Saturday, August 10, 2024
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DJ:
Lisa
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Amazing how much better the garden looks when it rains
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Lisa
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It's Too Hot
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DJ:
Lisa
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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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Lisa
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Floating in an inner tube on a pond in Maine
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Lisa
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Watch Out For Trees
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DJ:
Lisa
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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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DJ:
Lisa
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Is it Massachusetts or Florida outside?
