Category Astronomy/Space

Using the Hubble Space Telescope (HST), astronomers have observed a supermassive galactic open cluster designated Westerlund 1. Results of the study, published Jan. 28 on the pre-print server arXiv, yield essential details regarding the structure of this cluster.

Open clusters (OCs), formed from the same giant molecular cloud, are groups of stars loosely gravitationally bound to each other. It is assumed that most star formation takes place in massive clusters of stars, known as superstar clusters (SSCs). They are very massive young OCs usually containing a very large number of young, massive stars. The total mass of a typical SSC exceeds 10,000 solar masses.

Westerlund 1 is a supermas...

An international team has confirmed the discovery of a super-Earth orbiting in the habitable zone of a nearby sun-like star. The planet was originally detected two years ago by Oxford University scientist Dr. Michael Cretignier. This result, drawing on more than two decades of observations, opens a window to future studies of Earth-like exoplanets that may have conditions suitable for life.

The new planet, named HD 20794 d, has a mass six times that of Earth and orbits a star similar to our sun, located just 20 light years away. Its orbit places it within the habitable zone of the system, meaning it is at the right distance from its star to sustain liquid water on its surface, a key ingredient for life as we know it. The paper is published in the journal Astronomy & Astrophysics.

Measurements and data collected from space can be used to better understand life on Earth.

An ambitious, multinational research project funded by NASA and co-led by UC Merced civil and environmental engineering Professor Erin Hestir demonstrated that Earth’s biodiversity can be monitored and measured from space, leading to a better understanding of terrestrial and aquatic ecosystems. Hestir led the team alongside University of Buffalo geography Professor Adam Wilson and Professor Jasper Slingsby from the University of Cape Town on BioSCape, which collected data over six weeks in late 2024.

Two NASA aircraft and one South African aircraft flew over South Africa’s Greater Cape Floristi...

Searching for life in alien oceans may be more difficult than scientists previously thought, even when we can sample these extraterrestrial waters directly.

A new study focusing on Enceladus, a moon of Saturn that sprays its ocean water into space through cracks in its icy surface, shows that the physics of alien oceans could prevent evidence of deep-sea life from reaching places where we can detect it.

Published today (Thursday, 6 February 2025) in Communications Earth and Environment, the study shows how Enceladus’s ocean forms distinct layers that dramatically slow the movement of material from the ocean floor to the surface.

Chemical traces, microbes, and organic material — telltale signatures of life that scientists look for — could break down or transform as they travel...