The Moon reaches apogee, the farthest point from Earth in its orbit, at 5:46 A.M. EDT. At that time, our satellite will stand 251,996 miles (405,548 km) away. With the Moon sinking low in the hours ...

Earth's orbit is an ellipse, not a perfect circle. Earth's distance from the Sun varies by about 3 million miles throughout the year. Earth's orbit's semimajor axis is approximately 93 million miles.

NASA announced Wednesday that its Perseverance rover discovered what scientists are calling a “potential biosignature” in a rock on Mars last year. This signature, which may have a biological origin ...

The White House proposed a 24% budget cut to NASA for fiscal year 2026, a significant departure from historical precedent, with a 47% reduction specifically targeting science programs. Congress, ...

Great question! Assuming you’re referring specifically to the orbital period — in other words, how long comets take to make one revolution around the Sun, or a cometary “year” — according to basic ...

Researchers using the Low Frequency Array (LOFAR) radio telescope in Europe have discovered the second generation of Starlink satellites emit higher levels of radio waves that could pose a serious ...

When Don Pettit boarded the International Space Station (ISS) on Sept. 11, it was for him a homecoming. The 69-year-old chemical engineer already boasts a year-plus in space on three ISS missions ...

The early years of our solar system were a period of unimaginable chaos and violence, a gravitational free-for-all where colliding planetary embryos competed for survival. In this tumultuous ...

The 2025 astronomical year will feature Mars at opposition on January 15/16, exhibiting increased brightness and apparent size. Significant planetary events include Venus's transition from evening to ...

Human visual perception is inherently subjective, influenced by the brain's interpretation of retinal signals based on prior experience ("unconscious inference"), leading to illusions rather than a ...

Vesto Slipher first observed that galaxies are moving away from us. Edwin Hubble later showed a relationship between galaxy distance and speed. Hubble's work relied heavily on Slipher's earlier data.

A proposed interstellar mission envisions sending a gram-scale nanocraft, propelled by a laser-driven lightsail to a nearby black hole, achieving approximately one-third the speed of light. Upon ...