New Books Network Matthew Bothwell, "The Invisible Universe: Why There's More to Reality than Meets the Eye" (Simon and Schuster, 2021)
Apr 12, 2026
Matthew Bothwell, an observational astronomer and science communicator, guides listeners through the hidden cosmos beyond visible light. He explores the full electromagnetic spectrum, infrared views that pierce dust, spectroscopy as a cosmic detective tool, black holes and pulsars seen indirectly, radio mapping of hydrogen, gravitational waves, dark matter and dark energy, and the next generation of telescopes.
AI Snips
Chapters
Books
Transcript
Episode notes
IRAS Opened The Infrared Sky
- IRAS (1983) was the first space infrared all-sky survey and revealed red, dust-obscured galaxies and bright infrared sources like protoplanetary disks.
- Matthew Bothwell describes IRAS as a Google Earth–style scan that exposed previously invisible baby solar systems and dusty galaxies.
COBE Revealed The Universe's Baby Ripples
- COBE mapped the cosmic microwave background (CMB) and revealed tiny anisotropies—primordial ripples that grew into today's cosmic structure.
- Bothwell explains COBE resolved a crisis by detecting the small 'lumps' needed to seed galaxies and stars.
We Detect Black Holes By Their Effects
- Black holes are detected indirectly via their gravitational effects and energetic emission from accreting gas or companion dynamics.
- Bothwell recounts early detections: unseen massive companions in tight binaries and strong X-ray sources pointed to black holes.
