Traduzido por IA (Opus 5.5) a partir do cartão em inglês. Números, nomes e fontes não foram alterados.

Estrela com 2 planetas conhecidos

Proxima Cen

Proxima Cen, uma estrela M5.5 V, tem 2 planetas confirmados.

Medido

Sobre 4.2 anos-luz. Para atravessá-lo:

Voyager 1 à velocidade com que se afastou ao longo do ano até 2026-10-25 (JPL Horizons). Dirigindo: sem parar, sem nunca reabastecer.

Primeiro planeta descoberto em 2016 por velocidade radial (NASA Exoplanet Archive).

Proxima Cen b — 1 times Earth's width (estimated from its mass, not measured), about Earth-sized — probably rocky; its year lasts 11 days; about −55 °C, below freezing; found in 2016 by radial velocity.
Proxima Cen d — 0.7 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 5 days; about 9 °C, between freezing and boiling; found in 2025 by radial velocity.

NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.

Traduzido por IA (Opus 5.5) a partir do cartão em inglês. Números, nomes e fontes não foram alterados.

Estrela com 2 planetas conhecidos

Proxima Cen, uma estrela M5.5 V, tem 2 planetas confirmados.

Sobre 4.2 anos-luz. Para atravessá-lo:

Voyager 1 à velocidade com que se afastou ao longo do ano até 2026-10-25 (JPL Horizons). Dirigindo: sem parar, sem nunca reabastecer.

Primeiro planeta descoberto em 2016 por velocidade radial (NASA Exoplanet Archive).

Proxima Cen b — 1 times Earth's width (estimated from its mass, not measured), about Earth-sized — probably rocky; its year lasts 11 days; about −55 °C, below freezing; found in 2016 by radial velocity.
Proxima Cen d — 0.7 times Earth's width (estimated from its mass, not measured), smaller than the Earth; its year lasts 5 days; about 9 °C, between freezing and boiling; found in 2025 by radial velocity.

NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.