Proposed space probes

planned robotic Mars rover

planned orbiter by the Indian Space Research Organisation (ISRO) to study the atmosphere of Venus

proposed Indian Mars orbiter

JAXA-led mission to robotically explore and sample Mars' moons

Tianwen-4 (), formerly known as Gan De (), is a planned Chinese interplanetary mission to study the Jovian system, possibly sharing a launch with a spacecraft which will make a flyby of Uranus.

American privately held company

Tianwen-3 () is a planned Mars sample-return mission by China which would send two spacecraft (an orbiter/Earth-returner and a lander/ascent-vehicle) via two separate launches to Mars. Together, the two spacecraft will seek to obtain samples of Martian rocks and soil and then return the cached samples to Earth. The mission is scheduled to launch in 2028. The primary goal of the mission is to search for signatures of life on Mars.

DESTINY+ (Demonstration and Experiment of Space Technology for INterplanetary voYage with Phaethon fLyby and dUst Science) is a planned mission to fly by the Geminids meteor shower parent body 3200 Phaethon, and sample dust originating from the "rock comet". The spacecraft is being developed by the Japanese space agency JAXA and will demonstrate advanced technologies for future deep space exploration. As of October 2024, DESTINY+ is planned to be launched in fiscal year 2028.

proposed infrared space telescope

mars lander and orbiter to investigate atmospheric chemistry

planned 2020s private Venus astrobiology probe

OKEANOS (Oversize Kite-craft for Exploration and Astronautics in the Outer Solar system) was a proposed mission concept to Trojan asteroids, which share Jupiter's orbit, using a hybrid solar sail for propulsion; the sail was planned to be covered with thin solar panels to power an ion engine. In situ analysis of the collected samples would have been performed by either direct contact or using a lander carrying a high-resolution mass spectrometer. A sample-return to Earth was an option under study.

ODINUS (Origins, Dynamics, and Interiors of the Neptunian and Uranian Systems) is a space mission concept proposed to the European Space Agency's Cosmic Vision programme. The ODINUS mission concept proposes to expand the Uranus orbiter and probe mission to two twin orbiters— dubbed Freyr and Freyja, the twin gods of the Norse pantheon. Their primary mission would be to study Neptune and Uranus with one orbiter each. If selected, ODINUS would launch in 2034.

feasibility study of space missions to interstellar objects

TeamIndus (incorporated as Axiom Research Labs) is a private for-profit aerospace company headquartered in Bengaluru, Karnataka. It consists of a team of professionals from various backgrounds in science, technology, finance, and media, that came together in 2010 with the aim of winning the Google Lunar X Prize competition announced in 2007. Although the competition ended in 2018 without a winner, TeamIndus is still working towards developing and launching their lunar rover mission sometime in 2020 after partnering with OrbitBeyond.