Astronomy

an object in space that is a mass of ice and dust and when it nears the sun it starts illuminating in the shape of a tail

Halley's Comet is one of the most famous comets, visible from Earth approximately every 76 years.

a piece of rock coming from outer space that passes through the Earth's atmosphere, producing light

We saw a bright meteor streak across the sky during the meteor shower last night.

any of the rocky bodies orbiting the sun, ranging greatly in diameter, also found in large numbers between Jupiter and Mars

Scientists study asteroids to learn about the early solar system and potential threats to Earth.

a glowing cloud of gas and dust in outer space, often the result of a star explosion or formation

The Orion Nebula is a famous example of a stellar nursery.

a natural light display in the Earth's polar regions, caused by the collision of charged particles from the sun with atoms in the Earth's atmosphere

The breathtaking aurora danced across the night sky, painting it with vibrant hues of green and purple.

a specific group of stars that form a pattern and have a name related to their shape

Orion is a well-known constellation visible in the winter sky.

a circular representation of the twelve zodiacal constellations, showing the corresponding astrological signs

The ancient chart depicted all twelve zodiac constellations.

a planet that is outside the solar system

Astronomers have discovered thousands of exoplanets orbiting stars beyond our solar system.

the displacement of the spectrum of an astronomical object toward shorter wavelengths, indicating motion toward the observer

a small, dense, and faint stellar remnant that is left after a medium-sized star exhausts the nuclear fuel in its core and undergoes gravitational collapse

A white dwarf is the final stage in the life cycle of a sun-like star after it has exhausted its nuclear fuel.

a highly dense and compact stellar remnant that remains after a massive star undergoes a supernova explosion, consisting almost entirely of neutrons

Neutron stars are formed from the collapsed cores of massive stars after a supernova event.

the scientific study of how the universe is created, its development, and how it is going to end

a type of galaxy characterized by a spiral-shaped structure, consisting of a central bulge surrounded by spiral arms that contain stars, gas, and dust

The Milky Way, our home galaxy, is a prominent example of a spiral galaxy with its distinct spiral arms.

a type of galaxy characterized by its smooth, nearly featureless brightness profile and ellipsoidal shape, lacking significant spiral arms or disk-like structures

an optical instrument used for analyzing the spectrum of light, separating it into its individual wavelengths to identify and study the components of the light source

Astronomers use a spectroscope to analyze the light emitted by stars and galaxies, revealing information about their composition and temperature.

a galaxy that lacks a distinct, regular shape or structure, often appearing chaotic and asymmetrical

a mysterious object that some people claim to have seen flying around in the sky and assume that it is a spaceship from another world

Witnesses reported seeing an unidentified flying object hovering silently in the night sky.

an unmanned spacecraft designed to explore outer space, gather scientific data, and transmit it back to Earth

Voyager 1, a space probe launched by NASA in 1977, has ventured into interstellar space and continues to send valuable data back to Earth.

an astronaut from Russia or the former Soviet Union

Yuri Gagarin was the first cosmonaut to orbit the Earth in 1961.

a layer of charged particles, primarily electrons and protons, held in place around a celestial body by its magnetic field

the shift of light waves towards longer wavelengths, indicating the motion of an object away from the observer, commonly observed in the spectra of distant celestial bodies

Astronomers use redshift measurements to determine the velocity and distance of galaxies in the universe.