A newly discovered ice comet from deep space may be over 7 billion years old, making it the most ancient comet scientists ...

Some orbits can be nearly circular, moving at a relatively constant speed, like Earth’s path around the sun. However, most orbits are at least slightly elliptical, taking oval pathways and moving at ...

To do it they had to go to a dry lakebed in Nevada, and first build a model of the inner planets to a scale of 1 astronomical unit (AU, or distance from the Sun to Earth) of 176 metres.

In order to make a diagram of our solar system easy to read, one with to-scale orbits has inflated planet size. Only with a model like the one Overstreet and Alex Gorosh created can you see just ...

Centimeter-sized pebbles have been detected in protoplanetary discs using e‑MERLIN, filling in a critical phase of planet ...

A mystery interstellar object discovered last week is likely to be the oldest comet ever seen—possibly predating our solar ...

A seismic shift occurred in astronomy during the Scientific Revolution, beginning with 16th-century polymath Copernicus and his proposal that the Earth revolved around the sun. By the 17th century, ...

N ew research suggests that the Solar System may have captured a rogue planet, leading to changes in the existing orbits of the planets. The study, conducted by Edward Belbruno from Yeshiva ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

image: Southwest Research Institute scientists propose a new model for the formation of compact exoplanetary systems that contain multiple rocky planets in tight orbits around their star.