{"title":"Night Shift on the Mountain","description":"\u003cp\u003eTelescope nights: cold domes, thin air, and the sky that won't cooperate. Fifteen pixel-art physics mugs, M-46 to M-60.\u003c\/p\u003e","products":[{"product_id":"turbulorn-the-seeing-wraith-mug","title":"Turbulorn, the Seeing Wraith Mug","description":"\u003cp\u003eFried parameter r₀ ∝ λ\u003csup\u003e6\/5\u003c\/sup\u003e: seeing improves at longer wavelengths.\u003c\/p\u003e\n\u003cp\u003eThe joke: Observers switch to infrared when seeing is poor. The slogan on the mug reads \u003cstrong\u003eBAD SEEING? GO REDDER.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: D. L. Fried, J. Opt. Soc. Am. 56, 1372 (1966).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50974911987815,"sku":"12062749849222645039","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/5764488358980926615_2048.jpg?v=1793684190"},{"product_id":"secantha-the-setting-target-huntress-mug","title":"Secantha, the Setting-Target Huntress Mug","description":"\u003cp\u003eAirmass X ≈ sec z for zenith angles below about 60°; extinction grows with X.\u003c\/p\u003e\n\u003cp\u003eThe joke: Racing the target as it sets into thicker air. The slogan on the mug reads \u003cstrong\u003eSEC Z RISING. SO IS MY DESPAIR.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: F. Kasten \u0026amp; A. T. Young, Appl. Opt. 28, 4735 (1989).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976176963687,"sku":"27051988287563684895","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/17872673876759077164_2048.jpg?v=1793683615"},{"product_id":"duskward-the-astronomical-twilight-warden-mug","title":"Duskward, the Astronomical-Twilight Warden Mug","description":"\u003cp\u003eAstronomical twilight ends when the Sun's centre is 18° below the horizon.\u003c\/p\u003e\n\u003cp\u003eThe joke: Observers wait for 18°; civil twilight people are amateurs. The slogan on the mug reads \u003cstrong\u003e18 DEGREES BELOW OR IT DOESN'T COUNT.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: U.S. Naval Observatory, 'Rise, Set, and Twilight Definitions'.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976185548903,"sku":"33341881713489970740","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/15854507886820274813_2048.jpg?v=1793683623"},{"product_id":"streakwin-the-cosmic-ray-interloper-mug","title":"Streakwin, the Cosmic-Ray Interloper Mug","description":"\u003cp\u003eSea-level muon flux is about 1 per cm² per minute for a horizontal detector; cosmic rays leave streaks on long CCD exposures.\u003c\/p\u003e\n\u003cp\u003eThe joke: Every long exposure needs cosmic-ray rejection. The slogan on the mug reads \u003cstrong\u003eONE PER CM² PER MINUTE. ALL ON MY TARGET.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: Particle Data Group, 'Cosmic Rays' review (2022).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976194003047,"sku":"25881594550133734782","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/5779814748831149452_2048.jpg?v=1793683631"},{"product_id":"backglowen-the-sky-limited-lantern-mug","title":"Backglowen, the Sky-Limited Lantern Mug","description":"\u003cp\u003eCCD equation: in the sky-limited regime, sky background noise dominates read noise and SNR ∝ √t.\u003c\/p\u003e\n\u003cp\u003eThe joke: Noise from the sky, not the detector: the observer's existential crisis. The slogan on the mug reads \u003cstrong\u003eSKY-LIMITED. EVEN MY NOISE ISN'T MINE.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: S. B. Howell, Handbook of CCD Astronomy, 2nd ed. (Cambridge, 2006), §4.4.\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976202653799,"sku":"71899887392968341481","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/8163049628329021517_2048.jpg?v=1793683639"},{"product_id":"siderelle-the-four-minute-ghost-mug","title":"Siderelle, the Four-Minute Ghost Mug","description":"\u003cp\u003eA sidereal day is about 23 h 56 min 4.09 s, so stars rise about 4 minutes earlier each solar day.\u003c\/p\u003e\n\u003cp\u003eThe joke: Observers' schedules drift with LST. The slogan on the mug reads \u003cstrong\u003eTHE STARS RETURN 4 MINUTES EARLIER. I DON'T.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: IERS Conventions (2010), Tech. Note 36; Astronomical Almanac (USNO).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976210976871,"sku":"43883048193277431746","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/14934871192771122774_2048.jpg?v=1793683648"},{"product_id":"nimbryn-the-mie-scattering-grey-lady-mug","title":"Nimbryn, the Mie-Scattering Grey Lady Mug","description":"\u003cp\u003eMie scattering by cloud droplets (size ≫ λ) is nearly wavelength-independent, so clouds are white or grey.\u003c\/p\u003e\n\u003cp\u003eThe joke: Clouds block all bands; no filter helps. The slogan on the mug reads \u003cstrong\u003eMIE SCATTERING. NO FILTER SAVES YOU.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: G. Mie, Ann. Phys. 330, 377 (1908).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976219365479,"sku":"10898935983732070624","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/12426078079003963355_2048.jpg?v=1793683657"},{"product_id":"beaconess-the-laser-star-maker-mug","title":"Beaconess, the Laser-Star Maker Mug","description":"\u003cp\u003eLaser guide stars excite mesospheric sodium at 589 nm at about 90 km altitude.\u003c\/p\u003e\n\u003cp\u003eThe joke: Adaptive optics people literally make their own star. Distinct from the live Sodium Doublet poster. The slogan on the mug reads \u003cstrong\u003eNO STAR? MAKE ONE AT 90 KM.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: R. Foy \u0026amp; A. Labeyrie, A\u0026amp;A 152, L29 (1985); W. Happer et al., JOSA A 11, 263 (1994).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976227950695,"sku":"25486988023520210026","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/11225640431894278064_2048.jpg?v=1793683664"},{"product_id":"drycrest-the-water-vapour-hermit-mug","title":"Drycrest, the Water-Vapour Hermit Mug","description":"\u003cp\u003eHigh sites are chosen for low precipitable water vapour; in situ TMT site testing gave median PWV of 1.86 mm at Mauna Kea 13N (4050 m) and 1.70 mm at Cerro Tolonchar (4480 m).\u003c\/p\u003e\n\u003cp\u003eThe joke: Mm and submm astronomers know water is the enemy. The slogan on the mug reads \u003cstrong\u003eABOVE THE WATER. NOT ABOVE THE DEADLINE.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: A. Otárola et al., PASP 122, 470 (2010).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976236404839,"sku":"14517334379793152924","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/36135828398667788_2048.jpg?v=1793683672"},{"product_id":"slithera-the-parallactic-serpent-mug","title":"Slithera, the Parallactic Serpent Mug","description":"\u003cp\u003eAtmospheric differential refraction disperses star images vertically; align the slit along the parallactic angle to avoid losing blue light.\u003c\/p\u003e\n\u003cp\u003eThe joke: Spectroscopists' oldest lesson. The slogan on the mug reads \u003cstrong\u003eSLIT ALONG PARALLACTIC OR LOSE THE BLUE.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: A. V. Filippenko, PASP 94, 715 (1982).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976244858983,"sku":"26238492429503187753","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/2910856349525488474_2048.jpg?v=1793683679"},{"product_id":"nightglowe-the-airglow-sleepwalker-mug","title":"Nightglowe, the Airglow Sleepwalker Mug","description":"\u003cp\u003eOH airglow (Meinel bands) dominates the near-infrared night-sky background.\u003c\/p\u003e\n\u003cp\u003eThe joke: Near-IR observers know the sky itself is bright. The slogan on the mug reads \u003cstrong\u003eEVEN THE DARK SKY GLOWS.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: A. B. Meinel, ApJ 111, 555 (1950).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976253411431,"sku":"10589760840267850149","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/14858648316037853008_2048.jpg?v=1793683687"},{"product_id":"twinkelle-the-point-source-dancer-mug","title":"Twinkelle, the Point-Source Dancer Mug","description":"\u003cp\u003eStars scintillate but planets twinkle less because their angular size averages the fluctuations.\u003c\/p\u003e\n\u003cp\u003eThe joke: Size averages scintillation. The slogan on the mug reads \u003cstrong\u003ePOINT SOURCES TWINKLE. EXTENDED ONES COPE.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: D. Dravins et al., PASP 109, 173 (1997).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976261931111,"sku":"92981461020203354367","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/16792222441071023657_2048.jpg?v=1793683694"},{"product_id":"epochra-the-precession-navigator-mug","title":"Epochra, the Precession Navigator Mug","description":"\u003cp\u003eGeneral precession in longitude is about 50.3″ per year; coordinates must specify the epoch (J2000).\u003c\/p\u003e\n\u003cp\u003eThe joke: Pointing at old coordinates. The slogan on the mug reads \u003cstrong\u003eWRONG EPOCH. WRONG SKY.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: N. Capitaine et al., A\u0026amp;A 412, 567 (2003).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976262127719,"sku":"27355079249273208906","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/5935759417395964018_2048.jpg?v=1793683702"},{"product_id":"magnidra-the-pogson-scale-keeper-mug","title":"Magnidra, the Pogson Scale Keeper Mug","description":"\u003cp\u003ePogson's magnitude scale: 5 magnitudes equals a factor of 100 in flux.\u003c\/p\u003e\n\u003cp\u003eThe joke: Brighter is smaller; insiders only. The slogan on the mug reads \u003cstrong\u003eFIVE MAGNITUDES. 100 TIMES FAINTER.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: N. Pogson, MNRAS 17, 12 (1856).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976262553703,"sku":"14928975499797732363","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/965959677541213038_2048.jpg?v=1793683710"},{"product_id":"surgelle-the-full-moon-thief-mug","title":"Surgelle, the Full-Moon Thief Mug","description":"\u003cp\u003eOpposition surge: the Moon brightens sharply near zero phase angle (full moon).\u003c\/p\u003e\n\u003cp\u003eThe joke: Faint-object observers dread full moon. The slogan on the mug reads \u003cstrong\u003eFULL MOON. OPPOSITION SURGE. NO DARK TIME.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSource: B. J. Buratti, J. K. Hillier \u0026amp; M. Wang, Icarus 124, 490 (1996).\u003c\/p\u003e","brand":"Pixelated Physics","offers":[{"title":"11oz","offer_id":50976271040615,"sku":"29753203224400744784","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/219445011500021976_2048.jpg?v=1793683718"}],"url":"https:\/\/pixelatedphysics.com\/it\/collections\/night-shift-on-the-mountain.oembed","provider":"Pixelated Physics","version":"1.0","type":"link"}