To be curious or in doubt about

The quality of exciting amazed admiration

Appearance to the eye or mind.

To discover or ascertain the existence, presence, or fact of.

Forming or serving as an essential component of a system or structure; central.

An elongate depression of the earth's surface usually between ranges of hills or mountains.

An object launched to orbit Earth or another celestial body, as a device for reflecting or relaying radio signals or for capturing images.

A tool or implement used to do or facilitate work, especially a small precision tool used by a professional.

To direct on a course or in a direction.

An area of land not significantly higher than adjacent areas and with relatively minor differences in elevation, commonly less than 500 feet (150 meters), within the area.

A unit of measurement of angles, often shown by the symbol ° written after a number.

Fine particles of matter (as of earth).

The evidence or argument that compels the mind to accept an assertion as true.

A portion of territory that can be viewed at one time from one place.

Very great in size, extent, or quantity.