Helioscope vs. Sun — What's the Difference?

A helioscope is an instrument used in observing the sun and sunspots. The helioscope was first used by Benedetto Castelli (1578-1643) and refined by Galileo (1564–1642).

The Sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy mainly as visible light, ultraviolet light, and infrared radiation.

(astronomy) An apparatus for viewing the Sun without harming the eye, by means of an optical filter that attenuates most of sunlight while allowing only a small amount of the solar radiation.

Often Sun The star around which Earth and other planets orbit. It provides heat and light to Earth. It has a mean distance from Earth of about 150 million kilometers (93 million miles), a diameter of approximately 1,391,000 kilometers (864,000 miles), and a mass about 333,000 times that of Earth.

A telescope or instrument for viewing the sun without injury to the eyes, as through colored glasses, or with mirrors which reflect but a small portion of light.

A star that is the center of a planetary system.

The radiant energy, especially heat and visible light, emitted by the sun; sunshine.

A sunlike object, representation, or design.

To expose to the sun's rays, as for warming, drying, or tanning.

To expose oneself or itself to the sun.

The star that the Earth revolves around and from which it receives light and warmth.

(astronomy) A star, especially when seen as the centre of any single solar system.

The light and warmth which is received from the sun; sunshine or sunlight.

(figurative) Something like the sun in brightness or splendor.

Sunrise or sunset.

A revolution of the Earth around the Sun; a year.

A transversing of the sky by the Sun; a day.

The nineteenth trump/major arcana card of the Tarot.

(cartomancy) The thirty-first Lenormand card.

A traditional Japanese unit of length, approximately 30.3 millimetres (1.193 inches).

(transitive) To expose to the warmth and radiation of the sun.

(transitive) To warm or dry in the sunshine.

(intransitive) To be exposed to the sun.

To expose the eyes to the sun as part of the Bates method.

See Sunn.

The luminous orb, the light of which constitutes day, and its absence night; the central body round which the earth and planets revolve, by which they are held in their orbits, and from which they receive light and heat. Its mean distance from the earth is about 92,500,000 miles, and its diameter about 860,000.

Any heavenly body which forms the center of a system of orbs.

The direct light or warmth of the sun; sunshine.

That which resembles the sun, as in splendor or importance; any source of light, warmth, or animation.

To expose to the sun's rays; to warm or dry in the sun; as, to sun cloth; to sun grain.

A typical star that is the source of light and heat for the planets in the solar system;

The rays of the sun;

A person considered as a source of warmth or energy or glory etc

Any star around which a planetary system evolves

First day of the week; observed as a day of rest and worship by most Christians

Expose one's body to the sun

Expose to the rays of the sun or affect by exposure to the sun;