投稿時間:2025-03-29 14:07:02 RSSフィード2025-03-29 14:00分まとめ(4件)

カテゴリー	サイト名	記事タイトル	リンクURL	頻出ワード・要約等	登録日
Program	JavaScriptタグが付けられた新着投稿 - Qiita	3次元電子国土基本図を Web 地図にしてみた	https://qiita.com/mg_kudo/items/0405a5fe7dd299e1d1da	メッシュ,国土地理院,電子国土	2025-03-29 13:48:57
Program	JavaScriptタグが付けられた新着投稿 - Qiita	JSでパスワードの表示・非表示をする	https://qiita.com/yky-mss/items/8a88e22c2bb39f15c14c	input,lockpassword,クリック	2025-03-29 13:33:23
Program	JavaScriptタグが付けられた新着投稿 - Qiita	【就活生必見】キャッシュを使ってフィボナッチ数列の計算を爆速にする ~Python編~	https://qiita.com/arunbababa/items/4fdb05a9fc2f62142e4d	fnfn,python,キャッシュ	2025-03-29 13:04:46
海外TECH	Engadget	The Partial solar eclipse will be visible at sunrise today: Here's how to watch it	https://www.engadget.com/science/space/the-partial-solar-eclipse-will-be-visible-at-sunrise-today-heres-how-to-watch-it-144238679.html?src=rss	Today s the day A solar eclipse will darken the skies in the northeastern US and Canada in the early hours of Saturday Unlike the Great American Eclipse of however this will not be a total eclipse Instead this event will be a partial eclipse visible in parts of the northern hemisphere nbsp While this one will lack the dramatic totality of the event a partial eclipse is still worth seeing The sun will not be fully obscured but with proper eye protection you will be able to see the moon take a bite out of the sun And there s a catch but it s also an opportunity This eclipse will occur at sunrise in North America meaning the sun will just barely be above the horizon But that timing offers viewers the chance to see the famed devil horns ーa crescent of solar light emerging from behind the moon When can you watch this partial solar eclipse and those devil horns Let s talk about how to safely watch this eclipse What areas will experience the partial solar eclipse and when The partial solar eclipse will be visible in areas of the northern hemisphere It will be visible at sunrise in eastern North America and sunset in Siberia Russia on Saturday March In Europe it can be viewed around mid morning But the event s footprint will be limited No eclipse will be visible west of Toronto Canada and Washington DC in North America NASAThis global map of the partial solar eclipse from NASA is more than a little confusing but here s how to read it The yellow curve is the path of the partial solar eclipse moving from west to east The lighter colored yellow curves give the percent obscuration of the sun In other words how much of the sun is covered by the moon depends on where you are and when you re looking Most of Europe will only see around a percent obscuration with the exception of Greenland and Iceland for example while the extreme northeastern part of the United States will see up to percent of the sun covered The Nunavik region of Quebec will see maximum obscuration of percent The green lines on the map show the eclipse s progress over time Times are given in UTC which is four hours ahead of Eastern Daylight Time However sunrise and sunset makes things more complicated This is depicted on the map by the orange loop The left side of the loop over the Great Lakes in the United States shows where the eclipse ends at sunrise Therefore the eclipse is not visible west of that orange line The right side of the loop is where the eclipse begins at sunrise That means to see the maximum partial solar eclipse at sunrise it s best to be along that blue line running down the middle of the orange loop It s worth noting that the eclipse will also be visible across a narrow part of Siberia but at sunset rather than sunrise ーthat s what the other half of the orange loop depicts If it seems incredibly confusing that s because it is indeed incredibly confusing Some places with maximum obscuration will have a shorter eclipse duration because the partial eclipse will start before sunrise The sun will also be low to the horizon in North America so any viewing location will need to be above tall trees with a clear view of sunrise In Europe the viewing locations will be easier because the sun will be higher in the sky ーbut the sun will not be as obscured For example in Bar Harbor Maine the sun will rise at AM and the maximum eclipse will be at AM with percent of the sun obscured The partial eclipse will end at am Technically though the eclipse will begin at am ET but because that s before sunrise Mainers will be cheated out of about half their potential eclipse viewing time Moving south the best view will be through coastal New England then down through Boston New York City and Philadelphia The path basically ends in Washington DC where just percent of the sun will be obscured at AM ET NASAAccording to Time and Date only people will see a percent partial eclipse while will see an percent That s a far cry from the million people in the path of totality for the total solar eclipse Will a total solar eclipse be visible in the middle of the Atlantic Ocean No there is nowhere on Earth that a total solar eclipse will be visible for this event For any solar eclipse to happen the sun the moon and the Earth need to line up However because the moon doesn t orbit in the same plane as the sun and the Earth eclipses are rare A partial solar eclipse like the one occurring on March occurs when the moon passes between the sun and the Earth but it s not perfectly lined up As a result the sun will have a crescent shape ーas if the moon took a bite out of the sun ーbut it will never be fully obscured as it is during a total eclipse How long will the partial eclipse last The visible duration of the eclipse depends on where you are and what time sunrise or sunset is at your location But globally the eclipse will begin at am ET AM UTC The maximum eclipse will occur at AM ET AM UTC and the event will end at AM ET PM UTC Keep in mind though that this doesn t mean the entire partial eclipse will be almost four hours long in any given location because this is just for the extreme edges of the event What s the weather forecast along the viewing line It s spring across the Northern Hemisphere which generally means unfavorable weather for any sky viewing The Weather Channel s senior digital meteorologist Chris Dolce said that cloud cover and even rain and snow may be likely in the northeastern United States during the eclipse so it s not great news there unfortunately If it s just a partial eclipse do I need eye protection Anything that involves looking at the sun even just or percent of the sun requires eye protection The sun can damage your retinas quickly painlessly and often irreversibly If you have solar viewers left from the eclipse and they are undamaged they ll work just fine for this one too According to the American Astronomical Society AAS modern eclipse glasses do not expire It s worth checking them out thoroughly though making sure there are no rips tears or scratches across the lenses and that the filters and lenses are still attached to the frame Solar eclipse glasses can be difficult to purchase at the last minute so it s always good to keep them around However if you donated or trashed your previous pair or didn t buy them in the first place you can buy them online ーwith some caution Make sure any solar viewers conform to the ISO E international safety standard and check the manufacturer against this list of brands from the AAS Counterfeit eclipse glasses were rampant leading up the eclipse Celestron is a reliable manufacturer of solar viewer equipment and the company s eclipse glasses are readily available on Amazon for a low price though at this point you ll be stocking up for the next eclipses most of which are better viewed from the southern hemisphere nbsp What are some cool things to look out for during this eclipse A unique feature of solar eclipses during sunrise is you may be able to see the famed devil horns depending on where you are When the sun rises during an eclipse and therefore the sun is low on the horizon as the crescent sun rises it can look like devil horns coming up out of the ground An earlier sunrise partial eclipse over Rice Lake Ontario shows the devil horns phenomenon John Fader via Getty ImagesIt s best to target Maine New Brunswick and Quebec along the blue line in the NASA map to see this phenomenon Additionally the sun is currently at or near solar maximum which means that our star is basically at the peak of its year solar cycle Scientists determined that the sun hit the highest level of solar activity in October and this will continue for a year or so This means that there may be sunspots visible on the surface of the sun when the eclipse hits For context here s what the sun looks like right now courtesy of NASA s Solar Dynamics Observatory If you have solar binoculars or a solar telescope this will make them much easier to see Can I just point a telescope or camera at the sun If you re asking yourself this question you probably already know the answer Nope Not without a solar filter Whether it s a phone camera binoculars a telescope or a mirrorless camera the sun can do extreme damage to this kind of equipment On Apollo astronaut Alan Bean accidentally pointed a television camera at the sun irreparably damaging it Don t do this You can pick up solar filters at a camera store or online or in a pinch you can just use an extra pair of solar viewers Simply remove the film and tape it over your smartphone camera but don t look at the sun when aiming the camera unless you re wearing solar viewers as well If you are interested in looking at the sun regularly a pair of solar binoculars with a permanently attached filter is a great idea This article originally appeared on Engadget at	2025-03-29 04:23:09