Holding the System of HR 8799 Together
What does the future hold for the multiplanetary system of HR 8799 — can it remain stable?
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Measuring Solar Eruptions with a Rare Alignment
In 1998, a mass of plasma erupted from the Sun. Data from two perfectly aligned spacecraft now tell its story.
Warning: Neutron Star Collision Imminent
Could we alert follow-up telescopes to a neutron star collision even before the merger happens?
Selections from 2020: Hubble Observations of Psyche
Ultraviolet observations of the asteroid (16) Psyche reveal more about this unusual body’s surface.
Selections from 2020: Resolving Strands on the Sun
Images from a brief window of observation reveal spectacular strands of plasma in the Sun’s atmosphere.
Selections from 2020: No Hydrogen Ice for ‘Oumuamua
Could interstellar asteroid ‘Oumuamua be a speeding hydrogen iceberg?
Selections from 2020: Habitability of a Super-Earth
Not all habitable worlds are Earth-like! A recent study explored the potential habitability of a larger super-Earth.
Selections from 2020: A Twinkling Black Hole
Recent observations show Sgr A*, the supermassive black hole at the heart of the Milky Way, twinkling in radio light.
Selections from 2020: Alignment of the Solar System
The ecliptic plane may be where all the planets hang out, but there could be a second alignment plane within our solar system.
Selections from 2020: Expanding the Universe with GEODEs
The universe’s accelerating expansion might be driven by a sea of former stars that are now cores of dark energy.