TESS spots the rise of a black hole X-ray binary system

Designed to hunt for new alien worlds, NASA’s Transiting Exoplanet Survey Satellite (TESS) has serendipitously observed the rising outburst of a black hole X-ray binary known as AT 2019wey. The observations, which may help us better understand the nature of this system, were presented March 25 on the arXiv pre-print server.

The largest survey of exoplanet spins confirms a long-held prediction

For some time, astronomers have theorized that there is a connection between planetary mass and rotation. In the solar system, Jupiter and Saturn both rotate rapidly, completing a rotation in roughly ten hours, while accounting for a significant fraction of the solar system’s rotational energy. Using the W.M. Keck Observatory on Maunakea, Hawai’i, a team of astronomers tested this predicted relationship by studying 32 gas giants and brown dwarfs in distant star systems—6 giant planets larger than Jupiter and 25 brown dwarf companions.

Exploding primordial black holes might have reshaped the early universe, and created all matter as we know it

The early universe is absolutely so far outside our understanding of how the world works it’s hard to describe in words. Back then, the cosmos wasn’t filled with stars and galaxies but with a boiling soup of quarks and gluons, with a few microscopic black holes thrown in, occasionally detonating like depth charges. That’s the early universe theorized by a new paper, available in pre-print from arXiv, from researchers at Vrije Universiteit Brussel and MIT anyway.

The depths of Neptune and Uranus may be ‘superionic’

The interiors of ice giant planets like Uranus and Neptune could be home to a previously unknown state of matter, according to new computational simulations by Carnegie’s Cong Liu and Ronald Cohen. Their work, published in Nature Communications, predicts that a quasi-one-dimensional superionic state of carbon hydride exists under the extreme pressures and temperatures found deep inside these outer solar system bodies.

Earth from space: Eyes on our moon

In an unusual perspective for an Earth-observing satellite, the Copernicus Sentinel-2 mission captured this image of the moon, Earth’s only natural satellite. The Sentinel-2 mission acquired this lunar image by rolling one of its satellites sideways to view the moon instead of Earth. This is part of a regular calibration process, whereby the stable intensity of the moon’s light makes it possible to detect and correct even the smallest changes in the performance of Sentinel-2’s instrument. This ensures data accuracy throughout the mission, which is critical for its applications.

Webb eyes a pair of planet-forming disks

This month’s NASA/ESA/CSA James Webb Space Telescope Picture of the Month offers us a two-for-one on brand new stars—with some potential planets thrown in as well. This visual highlights Webb’s views of the protoplanetary disks Tau 042021 (left) and Oph 163131 (right), otherwise known by the catalog numbers 2MASS J04202144+2813491 and 2MASS J16313124-2426281, respectively. Tau 042021 is situated around 450 light-years from Earth in the constellation Taurus, while Oph 163131 lies about 480 light-years away in Ophiuchus.