时间:2025-04-26 18:18:18 来源:网络整理编辑:探索
Tonight, June 21, is the night of the summer solstice, meaning it's the evening of the longest day o
Tonight, June 21, is the night of the summer solstice, meaning it's the evening of the longest day of the year, and a great time for stargazing. Specifically: tonight you can (Dare I say must?) check out Mars and Venus. After all, the late night shows aren't airing, so you'll need something to do.
Do the visibility of Mars and Venus have anything to do with the solstice — the point at which the Earth is tipped in such a way that the sun is directly over the Tropic of Cancer? Not really, apart from the fact that the longest day of the year makes for the shortest night, which reduces your total stargazing time if you don't plan to sleep. Planetary visibility is based on the positions of Earth, Mars, Venus, and the sun in their respective orbits, not the Earth's tilt.
SEE ALSO:The best telescopes for gazing at stars, planets, and galaxies in 2023But tonight, when it's most likely a nice warm evening well after you're off work and done with dinner, you get a rare treat:
Tweet may have been deleted
You can see Venus and Mars closely aligned, right next to the moon.
Venus (like Mercury) is closer to the sun than us, and orbits the sun withinEarth's orbit around the sun. So broadly speaking, you have to look toward the sun to see Venus, and Venus-watchers really only have the hours just before sunrise and just after sunset to glimpse their favorite planet. Otherwise, they have to squint and try and see it during the day.
Tonight's task, therefore, is to look west, and see Venus and Mars lined up right next to the moon just after the very late sunset. If the weather is clear, Venus should be easily visible to the naked eye, but mars will be relatively tiny, and might require binoculars to make out. You'll have about three hours to watch the show.
Stargazing apps — such a SkySafari, Stellarium, and many others — are like cheat codes for seeing constellations and planets. Most have an augmented reality interface, meaning aim your phone at the sky, and you'll be presented with an idealized image of the heavenly bodies above you, labeled for your convenience. Once you know the position of what you want to see, simply put away your phone, let your eyes readjust to the dark, and then pretend you're an ancient astronomer, gazing up, naked-eyed, with renewed certainty as to what you're seeing.
Having just scored an easy win, and armed with the app of your choice, you'll be ready to kick off your season of stargazing during the warm summer nights.
Nate Parker is finally thinking about the woman who accused him of rape2025-04-26 18:00
楊旭獲加盟申花後首粒運動戰進球 下輪戰東道主迎考驗2025-04-26 17:52
曝皇馬1400萬歐年薪邀博格巴 再給他3000萬簽字費2025-04-26 17:33
河北省廊坊市體育局領導考察河北隊 就經營狀況進行交流2025-04-26 17:05
Twitter grants everyone access to quality filter for tweet notifications2025-04-26 16:28
紐卡補強計劃 :搜刮豪門邊緣實力派 必邀名帥掌舵2025-04-26 16:15
踢球or殺人 ?阿根廷遭瘋狂侵犯 梅西被從身後鏟翻2025-04-26 16:14
米蘭官方 :邁尼昂手術休戰10周 簽38歲老門將應急2025-04-26 16:13
One of the most controversial power struggles in media comes to a close2025-04-26 15:49
記者手記:出征49天健康回國就是勝利 在主場拿分仍有機會2025-04-26 15:44
Nate Parker is finally thinking about the woman who accused him of rape2025-04-26 17:38
巴西VS烏拉圭首發:內馬爾PK蘇亞雷斯 卡瓦尼登場2025-04-26 17:09
C羅熬雞湯:第10次戴帽有特殊意義 感謝隊友球迷2025-04-26 17:03
今明兩天六位候選人參加女足主帥麵試 肇俊哲最被看好2025-04-26 16:58
Balloon fanatic Tim Kaine is also, of course, very good at harmonica2025-04-26 16:56
走近紐卡 :擁有140年悠久曆史 球隊豐碑阿蘭2025-04-26 16:53
紐卡接觸維爾納欲冬窗挖角 多隊要求英超高管辭職2025-04-26 16:44
巴黎絕殺點球存爭議 昂熱將帥:伊卡爾迪犯規在先2025-04-26 16:27
Donald Trump's tangled web of Russian influence2025-04-26 16:10
申花足協杯大勝弱旅止頹 楊旭爆發李鐵有無想法?2025-04-26 15:53