On October 18, the predawn sky features a close celestial alignment of the Moon and Venus within the constellation Virgo. Venus appears as a magnitude -3.9 object, exhibiting a 94% illuminated gibbous ...

New research has identified 41 small-scale landslides on the lunar surface that formed since 2009, indicating the Moon is more geologically active than previously understood. Analysis of ...

The universe's expansion is accelerating, a phenomenon attributed to dark energy, potentially explained by a cosmological constant (Λ) in Einstein's general relativity. The ΛCDM model, the standard ...

On October 17th, early morning observations of Jupiter will feature transits of Io's and Europa's shadows across its cloud tops, with specific timings varying by time zone. A telescopic view of ...

August 2025 offers several planetary conjunctions, including a close approach of Venus and Jupiter on August 12th, and a second conjunction of Saturn and Neptune on August 6th, with a third occurring ...

The interstellar object 3I/ATLAS, confirmed by its hyperbolic trajectory, marks the first detection of hydroxyl gas (OH) from a visitor originating outside our solar system, indicating the presence of ...

Despite its integrated magnitude of 9.6, spiral galaxy NGC 6946 exhibits low surface brightness due to its apparent angular extent and position near the Galactic plane, necessitating apertures of at ...

Looking up at the Moon in the night sky, you would never imagine that it is slowly moving away from Earth. But we know otherwise. In 1969, NASA’s Apollo missions installed reflective panels on the ...

Hubble proved Andromeda is a separate galaxy by identifying a Cepheid variable star within it. Cepheid variables have a period-luminosity relationship: longer period means greater brightness. Knowing ...

The New Moon is typically invisible from Earth as its illuminated side faces away, with the shadowed side blending into the bright daytime sky when it is positioned between Earth and the Sun.

Apollo 7, crewed by Walter Schirra Jr., Donn Eisele, and Walter Cunningham, represented the first manned American spaceflight 21 months after the Apollo 1 fatal accident. Launching on October 11, 1968 ...

The article focuses on the observation of M34, a bright open cluster located in the southwestern region of the constellation Perseus, approximately 5° west-northwest of the variable star Algol. M34 ...