Paul Scott Anderson @paulscottanderson - Tumblr Blog

A new survey algorithm - called Transit Least-Squares - has just caused the number of known, rocky, Earth-sized worlds orbiting distant stars to grow again, as astronomers add another 18 exoplanets to the list.

#exoplanets #Kepler #space

Does Pluto have an ocean? That idea seems preposterous at first, but a new study adds to the growing evidence for a subsurface ocean on this distant dwarf planet ... and explains how it stays liquid.

#Pluto #New Horizons #space

Composite high-resolution view of 2014 MU69, as seen by New Horizons on Jan. 1, 2019. Photo Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute//Roman Tkac…

#2014 MU69 #New Horizons #space

Dwarf planet Haumea orbits in Pluto's realm of the solar system. It's the most distant little world known to have a ring. Scientists in Brazil have new insights on how Haumea's ring maintains its nearly perfect circular shape.

#Haumea #dwarf planets #rings #space

It seems like play, but they're serious. Every year, at the Planetary Defense Conference, asteroid experts from around the globe run days-long simulations of asteroids headed for major cities. In 2019, it was New York City's turn.

#asteroids #New York City #space

Distant water exoplanets might have oceans thousands of miles deep. That's in contrast to Earth's ocean, which is about 6.8 miles (about 11 km) deep at its deepest point.

#exoplanets #water worlds #space

I like that my building has this new parcel locker from Canada Post. 🙂📦

#parcels #mail #Canada Post

Solar sails use faint pressure from sunlight to propel a spacecraft forward. A next-generation solar sail - called a diffractive solar sail - might be made of metamaterials, or smart materials.

#solar sails #NASA #metamaterials #space

STEVE is a majestic sky phenomenon, similar to well-known auroras, but not as well understood. Now, a new study provides an explanation.

#auroras #STEVE #Earth #space

The 1st-ever photo of a giant black hole made headlines earlier this month. Now see some beautiful images of M87, the great galaxy that it calls home, located some 55 million light-years from Earth.

#black holes #galaxies #space

Here's how NASA's MESSENGER mission - which orbited Mercury from 2011 to 2015 - let scientists finally solve one of Mercury's biggest mysteries, about whether its innermost core is liquid or solid.

#Mercury #MESSENGER #space

#Titan #Saturn #Cassini #space

Launched in 2018, TESS is NASA's new space-based exoplanet hunter. Now it's found its 1st Earth-sized world orbiting a nearby star. The discovery bodes well, scientists say, for finding more similar worlds in the near future.

#exoplanets #TESS #space

'Oumuamua - 1st known object to sweep past us from beyond our solar system - caused a stir when astronomers spotted it in 2017. Now a new study suggests another interstellar object might have hit the Earth in 2014.

#'Oumuamua #meteors #space

Cassini data now reveal that some of Titan's lakes are surprisingly deep.

#Titan #Cassini #space

NASA’s Mars InSight lander has measured and recorded for the first time ever a likely “marsquake.”

#Mars #InSight #marsquakes #space

In 2013, in a big success story, a Mars rover and orbiter made a near-simultaneous observation of methane in Mars' atmosphere. Now a newer mission orbiting Mars - ESA's Trace Gas Orbiter - has failed to detect methane. Why?

#Mars #methane #Trace Gas Orbiter #space

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Paul Scott Anderson