Science & Astronomy

A total eclipse in America describes a solar eclipse in which the Moon completely covers the Sun’s bright disk for viewers within a narrow path on Earth. This brief window of...

An eclipse is an astronomical event that occurs when one celestial body moves into the shadow of another. For Earth, the two main types are lunar and solar eclipses, each arisin...

To see the blood moon tonight, focus on moonrise in your location during a total lunar eclipse, typically beginning after sunset and peaking after midnight depending on your tim...

A blue moon is a calendar label in the monthly sequence of Moon phases, not a specific color of the Moon. It refers to an extra full Moon that appears in a calendar period that...

The lunar eclipse on September 7 2025 is a penumbral lunar eclipse visible from regions where the Moon is above the horizon during the event. Unlike a total or partial eclipse,...

From space, the northern lights, or aurora, appear as shifting curtains and arcs of green, red, and purple light that outline Earth’s magnetic field lines. Astronauts on the I...

Solar eclipses occur when the Moon passes between Earth and the Sun, briefly turning daylight into dusk for a narrow path of viewers. In any given year, there are between two an...

The summer and winter solstice mark two key moments in Earth’s annual cycle when daylight reaches its longest or shortest extent in each hemisphere. The summer solstice brings...

Lunar cycles refer to the repeating changes in how the Moon looks from Earth, driven by its orbit and the geometry of the Sun, Earth, and Moon. As the Moon circles Earth, differ...

A full moon occurs when the Moon is on the opposite side of Earth from the Sun, with the Sun fully illuminating the hemisphere facing us. This phase happens roughly once every 2...

The winter solstice is the moment the sun reaches its southernmost declination as seen from Earth, marking the shortest day and longest night of the year in the respective hemis...

A solar eclipse starts at first contact, when the Moon"s penumbra touches the Sun"s disk, and the partial phase begins. For any location, the precise start depends on your coord...

On any given night, whether Saturn appears close to the Moon depends on the Moon’s phase and position in its orbit, which changes nightly, and on Saturn’s much slower motion...

The full moon in May occurs once per year, typically near the middle of the month, when the Moon is opposite the Sun in ecliptic longitude. Because the lunar calendar shifts eac...

A blood moon is the popular name for the Moon during a total lunar eclipse, when Earth passes directly between the Sun and the Moon. This alignment puts the Moon into Earth’s...

At a high level, astronomers research the universe by observing celestial objects and interpreting data. Day to day, this often means planning and carrying out observations with...

Stars that start with H represent a diverse set of objects in the night sky, from nearby neighbors to distant supergiants. This guide explores their characteristics, visibility,...

The phrase "lost star dies" commonly refers to what occurs when a star exhausts its nuclear fuel and reaches the end of its lifecycle. A star's death determines its final state...

Summer begins 2019 marked the arrival of astronomical summer in the Northern Hemisphere on Sunday, June 23, 2019, at 11:54 UTC. In local time zones this corresponded to roughly...

Stars die when they exhaust the nuclear fuel that creates outward pressure, causing gravity to collapse their interiors and reshape or eject their outer layers. How a star dies...

Stars that start with P include prominent members of the night sky such as Pollux, Procyon, and Pegasus (Alpha Pegasi). This overview focuses on verified stellar properties usef...

Stars die when they exhaust their nuclear fuel and can no longer sustain the pressure that balances gravity. The fate of a star is primarily set by its mass. Lower‑mass stars...

Stars die when they exhaust the nuclear fuel that counteracts gravitational collapse, and how a star dies depends mainly on its initial mass. These life cycles forge and dispers...

The phrase "latest stars" usually refers to newly cataloged objects confirmed as stars rather than planets, brown dwarfs, or transient events. When observatories report a find,...

Trappist-1 is an ultra-cool dwarf star with a lifespan measured in tens of billions of years, far longer than the current age of the universe. Its low mass and slow fusion rate...