• the gamma-ray burst (GRB) 090423 (pictured), whose light took approximately 13 billion years to reach Earth, is the oldest and most distant known object in the Universe?
• the 1774 Schiehallion experiment to calculate the density of the Earth also made the first use of contour lines to represent height?
• studies in phage ecology indicate that viruses may be the most abundant organisms on Earth?
• some astrologers claim Earth has a second moon they call Lilith?
• the Hoba meteorite is the largest known meteorite ever found on earth?
• the planetary nebula luminosity function is an accurate standard candle (luminosity measurement) outside Earth's home galaxy, the Milky Way, despite an average error factor of two for distance estimates to planetary nebulae within this galaxy?
• troilite, a form of pyrrhotite, is extremely rare on Earth but is abundant on Mars (pictured)?
• there have been several proposals for space advertising projects, including a giant, 1km² billboard visible from Earth?
• the westerlies steer warm water currents, such as the Gulf Stream, from west to east across the oceans of Earth?
• the Rho Ophiuchi cloud complex is one of the star-forming regions closest to the Earth?
• just over 50 kilometres above its surface, the atmosphere of Venus has very similar pressure and temperature as does Earth, making it the most Earth-like area in the solar system?
• in 2009 two MIT students made a vehicle to take pictures of the Earth from 93,000 feet (28,000 m) for US$148?
• Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?
• creationist museums present a young Earth creationist view that Earth and life were created c. 6,000 years ago in six days?
• ANTARES, a neutrino telescope under construction in the Mediterranean Sea, will find neutrinos from outer space by looking downward, into the Earth?
• 6Q0B44E, a recently discovered satellite of Earth, is thought to be a large piece of space debris?
• Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?
• Lake Karachay in Russia is the most polluted spot on earth?
• in 2004, Expedition Global Eagle was the first attempt in history to circumnavigate the globe using an autogyro?
• Severnaya Zemlya was the last archipelago on Earth to be discovered?
• Otokichi (1818–1867) was a Japanese castaway, who circled the globe as he tried unsuccessfully to return to Japan?
• giant kelp (pictured) can grow as much as two feet per day, making it the fastest-growing organism on Earth?
• carbonate hardgrounds were most commonly formed during calcite sea intervals in the Ordovician and Jurassic periods in Earth's history, but were virtually absent from the aragonite seas of the Permian era?

Facts on topics related to Earth

Nature

• Stoic philosophy contrasts kathekonta, actions in accordance with nature, with "perfect actions" (katorthomata) derived from pure reason?
• Bron Taylor coined the term "dark green religion" as a set of beliefs characterized by a conviction that "nature is sacred, has intrinsic value, and is therefore due reverent care"?

Moon

• 17th-century philosopher Cesare Cremonini refused to look at the Moon's mountains through Galileo's telescope, believing that Aristotle had proven the Moon was a perfect sphere?
• NASA conducts field trials, called Desert RATS, for new technologies for manned exploration of the surface of the Moon, Mars, or beyond?
• Carpenter is a lunar impact crater located in the northern part of the Moon, causing it to appear oval in shape when in fact it's nearly circular?
• Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?
• Kordylewski clouds are large concentrations of dust that orbit Earth at the distance of the Moon?
• a small silicon disc containing goodwill messages from 73 countries was left on the Moon by the Apollo 11 astronauts?
• according to an old Polish legend, the sorcerer Pan Twardowski was the first man on the Moon?
• in Chinese mythology, Wu Gang had to chop down a tree on the moon that always healed itself, forcing him to keep trying forever?
• in the indie video game Clean Asia!, the eyes of all humans leave their bodies, fly to the moon, develop weapons, and attack the human race, taking over several countries?
• there were three more cancelled Apollo missions planned to land on the Moon after Apollo 17?

Mars

• ejecta from the impact that created Zunil crater in Athabasca Valles on Mars is a possible source of Martian meteorites?
• Mars' south polar ice cap may be melting due to regional climate change?
• NASA conducts field trials, called Desert RATS, for new technologies for manned exploration of the surface of the Moon, Mars, or beyond?
• CRISM is a spectrometer on the Mars Reconnaissance Orbiter, and will be used to find minerals on the surface of Mars?
• Yogi Rock is a rock found on Mars by the Mars Pathfinder mission that looks surprisingly like Yogi Bear's head?
• a fossilized delta in Eberswalde crater provides strong evidence for flowing water on Mars?
• the Tagish Lake meteorite that impacted Canada on January 18, 2000 may be a broken off piece of the 773 Irmintraud asteroid that orbits between the planets Mars and Jupiter?
• the Tooting impact crater on Mars was named after the London suburb of the same name because the discoverer "thought [his] mum and brother would get a kick out of having their home town paired with a land form on Mars"?
• the only known source of the mineral Macaulayite in the world is in a quarry at the foot of Bennachie, Aberdeenshire – but it may also be present on Mars?
• troilite, a form of pyrrhotite, is extremely rare on Earth but is abundant on Mars (pictured)?

Mercury (planet)

• scarps, ridges, and troughs, such as the 650 km (400 mi) long and 2 km (1.2 mi) high Discovery Rupes cutting through the Rameau crater, are common features in the Discovery quadrangle on the planet Mercury?
• ridges and escarpments in the Victoria quadrangle of the planet Mercury have been associated with the stresses caused by the sun slowing Mercury's rotation through tidal forces?
• water vapor is probably present in the tenuous atmosphere of Mercury, being brought to the planet by comets?
• systematic mapping of the Michelangelo quadrangle on Mercury has revealed the presence of four nearly obliterated multi-ring impact basins, possibly the oldest features in the mapped areas of the planet?
• the Beethoven crater in the Beethoven quadrangle on Mercury is the eleventh largest named impact crater in the Solar System?
• the Caloris Basin on Mercury, one of the largest impact basins in the Solar System, is surrounded by a series of geological formations believed to have been produced by the basin's ejecta?
• the European and Japanese collaborative BepiColombo mission (pictured) is planned to be the first extensive mission to Mercury since Mariner 10?
• the Kuiper crater in the Kuiper quadrangle, named after Dutch American astronomer Gerard Kuiper (pictured), has the highest albedo recorded on Mercury?
• the north pole of the planet Mercury is located in the Borealis quadrangle?
• the south pole of the planet Mercury is located in the Bach quadrangle?