古代の天文学者は、空にある物体を観察する道具を持たなかった。の英語

Ancient astronomers did not have instruments to help them see objects in the sky.

Ancient astronomers did not have instruments to help them see objects in the sky.

Early explorers used the stars for navigation.

with earth-based telescopes many stars remain undiscovered

Ancient astronomers noticed constellations and gave them names.

The researchers have still not observed the planet directly.

Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance

They scanned the sky for the spacecraft.

a quasi-stellar object that mistakenly appears in a photograph to be a star, called

United States astronomer who discovered the planet Pluto (1906-1997)

United States astronomer who discovered that (as the universe expands) the speed with which nebulae recede increases with their distance from the observer (1889-1953)

As a teenager, I spent a lot of time observing planets through an astronomical telescope.

sky watchers discovered a new star

I have a knowledge of astronomy.

My father studies astronomy, or the science of stars.

Almost 20 years ago, Japanese astronomers were arguing about the future of astronomy in Japan.

In theological terms [In terms of theology, From the point of view of theologians] all the new astronomical discoveries were unforgivable.

Astronomy is the science of heavenly bodies.

English astronomer who pioneered spectroscopic analysis in astronomy and who discovered the red shift (1824-1910)

He was a great authority on astronomy, or the science of the heavenly bodies.

He contends that primitive life once existed on Mars.

From the windows of an observatory, people could observe the equinox sunset and other astronomical events.

A giant extraterrestrial sphere is found outside the orbit of Jupiter.

They have an advanced knowledge of astronomy.

Several astronomical observatories and science museums held observation events.

a division of astronomy that studies neutrinos found in outer space

an ancient Greek astronomer who was one of the first to propose a heliocentric theory of the universe (circa 270 BC)

He studies astronomy, or the science of stars.

a network of fine lines used by astronomers as a reference for measurements on star photographs

The International Astronomical Union has not yet decided whether the discovery can officially be called a new planet.