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Planetary Defence Archive

Planetary Defence

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ESA spots asteroid that made very close approach to Earth

Close approach of asteroid 2025 FA22

ESA observes interstellar comet 3I/ATLAS

Close approach of asteroid (424482) 2008 DG5

Close approach of asteroid (612356) 2002 JX8

Hera Mars flyby

Hera: Target Deimos

Asteroid 2024 YR4 impact risk rises and falls

Close approach of asteroid 2020 XR

Close approach of asteroid 2006 WB

Moon waves goodbye to Hera

Space Safety for the Moon

Ramses mission patch

Mission control GO for Hera launch

Nearing Hera era in space

View from Hera’s Asteroid Deck

Close approach of asteroid 2024 ON

Hera CubeSats’ touchdown

ESA’s final observations of asteroid 2024 RW1

Hera in the doghouse

Ahead of Asteroid Day, the Copernicus Sentinel-2 mission takes us over the Meteor Crater, also known as the Barringer Meteorite Crater.

Close approach of asteroid (415029) 2011 UL21

Hera plus one: enter the CubeSat

Close approach of asteroid 2013 NK4

Orbit of comet 12P/Pons-Brooks around the Sun

Sketches of comet 12P/Pons-Brooks from 1884

Comet 12P/Pons-Brooks

When and where to observe comet 12P/Pons-Brooks

Apophis in the new Synodic Orbit Visualisation Tool

Apophis orbit diverted by Earth's gravity

Hera’s wings of power

Asteroid safe close approach: (139622) 2001 QQ142; December 2023

Hera takes wing

Hera approaching Didymos asteroids

Mini-radar for asteroid CubeSat

ESA's Estrack network tracks DART in the vital moments before asteroid impact

Deep within the Sahara Desert lies one of the best-preserved craters on Earth. On Asteroid Day, the Copernicus Sentinel-2 mission takes us over the almost-perfectly circular Tenoumer Crater in Mauritania.

Asteroid 2020 XL5 has been confirmed as the second known Earth Trojan asteroid

ESA's Australian ground station to catch DART's first words

For Asteroid Day, the Copernicus Sentinel-2 mission takes us over the Shoemaker Impact Structure (formerly known as Teague Ring) in Western Australia.

Eye of ESA’s asteroid mission

ESA's Test-Bed Telescope 2 at sunset at ESO's La Silla Observatory in Chile

ESA's Test-Bed Telescope 2 on site at ESO's La Silla Observatory

ESA's Test-Bed Telescope 2 at ESO's La Silla alongside other telescopes

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