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太陽系

94 件の記事

The interplanetary dust cloud illuminated and visible as zodiacal light, with its parts the false dawn,[1] gegenschein and the rest of its band, which is visually crossed by the Milky Way, in this composite image of the night sky above the northern and southern hemisphere

惑星間塵雲の正体太陽系を漂う宇宙の塵とそのダイナミクス

惑星間塵雲黄道光宇宙塵太陽系
The pinhole-projected image of the Sun on the floor at Florence Cathedral. Cassini measured a similar image over a year at San Petronio Basilica to try to prove the Earth orbited the Sun.

ジョヴァンニ・ドメニコ・カッシーニ土星の謎を解き明かした天文学の先駆者

ジョヴァンニ・ドメニコ・カッシーニカッシーニの間隙パリ天文台土星の環
Diagram of generic quasi-satellite orbit

準衛星(クアジサテライト)とは?惑星の「偽の月」と呼ばれる天体の正体

準衛星クアジサテライト軌道共鳴地球
The trojan points are located on the L4 and L5 Lagrange points, on the orbital path of the secondary object (blue), around the primary object (yellow). All of the Lagrange points are highlighted in red.

トロヤン小惑星とは?ラグランジュ点に潜む宇宙の伴走者

トロヤン小惑星ラグランジュ点木星トロヤン共軌道天体
Retrograde orbit: the satellite (red) orbits in the direction opposite to the rotation of its primary (blue/black)

逆行運動のメカニズム天文学における回転と公転の方向性

逆行順行天文学公転方向
Transits of Venus across the face of the Sun were, for a long time, the best method of measuring the astronomical unit, despite the difficulties (here, the so-called "black drop effect") and the rarity of observations.

天文単位(au)とは?太陽系を測る基準となる距離の定義と歴史

天文単位au地球・太陽間距離天文学
A comet was mentioned in the Anglo-Saxon Chronicle and by the Venerable Bede in the year 729 CE.[13][14]

彗星の正体と宇宙の旅氷と塵の天体が描き出す神秘

彗星ハレー彗星オールトの雲エドモンド・ハレー
Gas giant formation in the protoplanetary disk around young star HD 100546 (Artist's impression).[1]

一次大気の形成メカニズムと惑星進化への影響

一次大気原始大気原始惑星系円盤ガス集積
The heart-shaped Tombaugh Regio, on Pluto, is named after the dwarf planet's discoverer Clyde Tombaugh.

惑星命名法太陽系天体の地名決定ルールと国際基準

惑星命名法IAU国際天文学連合天体地名
Reprocessed Mariner 10 data was used to produce this image of Mercury. The smooth band is an area of which no images were taken.

マリナー10号水星と金星への先駆的な旅

マリナー10号NASA水星探査金星フライバイ
Retrograde orbit: the satellite (red) orbits in the direction opposite to the rotation of its primary (blue/black)

逆行運動のメカニズム天文学における回転と公転の不思議

逆行運動順行公転周期自転軸
Artist's impression of the structure of the Milky Way based on data from the European Space Agency's Gaia telescope, including the location of the spiral arms, bar, and bulge

天の川銀河の構造と謎私たちの故郷である巨大渦巻銀河の全貌

天の川銀河銀河系渦巻銀河ダークマター