astro-, astr-

Diagnosis by means of horoscopy (the making and interpretation of predictions of someone's future based on the relative positions of the planets) and palmistry (telling fortunes by lines on the palm of the hand or hands).

A transparent, usually plastic dome mounted on top of an aircraft or spacecraft; used primarily for celestial navigation.

The systematic planning and directing of spacecraft trajectories through the application of celestial mechanics and allied fields.

Someone; usually a man, who navigates in outer space either in interplanetary travel or in interstellar travel.

The creation or evolution of the stars or the heavens.

The study of the origin, history, and structure of cosmic bodies other than Earth; the geology of celestial bodies: Astrogeology is the science dealing with the arrangement and composition of planets and other heavenly bodies in the solar system.

1. The astrocytes of the central nervous system, which function as connective tissue.
2. An abnormal enlargement and proliferation of glia, the cells in the brain that fight infection.
3. Sub-types of the glial cells in the brain. They are also known as astrocytic glial cells. Star-shaped, there many arms span all around neurons.
4. Neuroglial cells of ectodermal origin, characterized by fibrous, protoplasmic, or plasmatofibrous processes. Collectively, such cells are called astroglia.

The science or knowledge of the stars; especially, the fixed stars.

A descriptive reference to the creation or evolution of the stars or the heavens.

The theory of the origin of the stars.

1. A navigational device for projecting altitude curves of the stars and planets onto charts or plotting sheets.
2. Mapping or describing the stars.

A photographic telescope, usually with a field of view of at least one degree across.

1. Relating to the mapping of the sky.
2. A reference to the science of star descriptions.

1. The mapping of the heavens.
2. The science involving the descriptions of the stars.

1. Like a star or star-shaped.
2. A small, irregularly shaped object made of metal; such as, iron and nickel, rocky materials, or a combination of the two that orbits the sun or a planet.

In our solar system, most of the asteroids orbit in a broad band between the orbits of Mars and Jupiter. The largest is Ceres, which is about 600 miles or 900 kilometers in diameter.