A classic optics experiment, in space with asteroids and AGNs!
Radio observations of the diffracted shadow cast by an asteroid can be used to nail down its location and determine its size and shape.
A summary of EWASS 2018 (II)
The second post in our coverage of the European Week of Astronomy and Space Sciences 2018 in Liverpool, UK, including a review of the Cassini mission, reports from the European Space Agency and the European Southern Observatory, and an introduction to the Square Kilometre Array.
No dust ring required around Proxima Centauri
What is responsible for the excess radio emission from our nearest star, Proxima Centauri? No alien radio stations required!
First Detection of the 21cm Cosmic Dawn Signal
Radio astronomers detect the first signature of a global 21cm signal with some interesting implications for dark matter.
Imaged Companion Drives Spiral Arms in Disk
Using 14 years of high resolution near-infrared imaging, radio observations of molecular gas, and a hydrodynamic simulation the authors show that spiral arms seen in the protoplanetary disk around HD 100453 A are caused by its M-dwarf companion.
Radio Images of a Nearby, Ghostly Globule
A ghostly plasma lens occulting QSR J1819+3845 has been imaged directly at radio wavelengths. What can we learn about this strange interloper? (Image: unrelated observation of solar activity resembling a jack-o’-lantern, courtesy NASA/GSFC/SDO)