Vocabulary

celestial equator

form of astrology based on the Xiuyaojing (brought to Japan in the Heian period)

Edo-period office in charge of compiling the traditional calendar, astronomical measurements, surveying, translating Western books, etc.

Chinese "root" constellation (one of the 28 mansions)

Chinese "ghost" constellation (one of the 28 mansions)

transit (of a planet) over the Sun

transit (of a planet) over the Sun

planetary science

eyepiece; ocular lens

eyepiece; ocular lens

primary mirror (of a telescope); main mirror

light reduction; dimming of a light

neutral-density filter

neutral-density filter; ND filter

teardrop-shaped

optical illusion

artificial object; man-made object

active optics (telescope)

adaptive optics (esp. in a telescope)

asterism (pattern of stars which do not form a constellation)

asterism; pattern of stars which do not form a constellation

Hokuto

Cepheid variable

torquetum

study of the calendar; way of the calendar

study of calculation (ritsuryō period); the way of calculation

cuttlefish; squid

cargo sling

baby sling

Base64; binary data/text data encoding conversion defined by MIME

Trollius riederianus var. japonicus (Japanese variety of the Kamchatka globeflower, Trollius riederianus)

to bring someone to grief; to give someone hell

country that has been a victim of nuclear bombing

clunk; thump

whiz (e.g. projectile through air); swoosh; whoosh; whistling sound

systematically; in turn; consequentially; mechanically; automatically

not give a damn; not care a bit

incorrect answer; wrong solution; incorrect interpretation

turning around; spinning around; curling up

loser; the defeated