Definition: Having the shape or form of a helix, which is a three-dimensional spiral structure.

Example: The staircase had a helicoidal design that made it look elegant and modern.

Definition: Relating to a model of the solar system where the sun is at the center and the planets orbit around it.

Example: The heliocentric model changed our understanding of the universe by placing the sun at the center.

Definition: To send a message using a device that reflects sunlight, typically for communication over long distances.

Example: The soldiers used a heliograph to communicate with each other across the valley.

Definition: A tool used to send messages or take pictures using sunlight.

Example: The scientist used a heliograph to communicate with his team from a distance.

Definition: To send a message using a device that reflects sunlight, typically for long-distance communication.

Example: The military used a heliograph to send signals across the desert.

Definition: Related to a method of recording images using sunlight or the sun's rays.

Example: The scientist used a heliographic technique to capture the solar images.

Definition: A type of telescope that is used to measure small angles between celestial objects, especially to determine the size of the sun and other celestial bodies.

Example: The astronomer used a heliometer to measure the distance between the stars.

Definition: Relating to a device used for measuring the angles of celestial bodies by comparing their brightness with that of the sun.

Example: The heliometric measurements helped astronomers determine the distance to the stars more accurately.

Definition: In Greek mythology, this term refers to the god who represents the sun, often depicted as driving a chariot across the sky each day.

Example: In ancient stories, Helios would rise in the morning and set in the evening, illuminating the world with his light.

Definition: The area in space around the sun where the solar wind affects the environment, including the entire solar system.

Example: The heliosphere acts as a protective bubble for the planets in our solar system.

Definition: Relating to the region of space influenced by the solar wind and the magnetic field of the Sun.

Example: The heliospheric boundary is where the solar wind meets the interstellar medium.

Definition: A device that uses a movable mirror to reflect sunlight in a specific direction, often used for measuring solar radiation or in solar energy applications.

Example: The heliostat adjusted its mirror to keep the sunlight focused on the solar panel throughout the day.