Bryan McAllister’s personal reference notebook
July 30, 2026Short & citedBlog
Civic Viewpoint.
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Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Field Notes • Astronomy

Venus

Venus is the second planet from the Sun and Earth’s nearest planetary neighbour.

Updated July 30, 20261 min readCited sources

Venus is the second planet from the Sun and Earth’s nearest planetary neighbour. It is a rocky terrestrial planet with a dense carbon dioxide atmosphere, making it the hottest planet in the Solar System.

What it is

Venus is a terrestrial planet similar in size and structure to Earth. Its surface includes mountains, volcanoes, craters, and lava plains. The planet has no moons and no rings.

Why it matters

Venus’s thick atmosphere creates a runaway greenhouse effect that traps heat, pushing surface temperatures to about 467 °C. This makes it the hottest planet in the Solar System, even hotter than Mercury, which is closer to the Sun.

Key details

Venus orbits the Sun in 225 Earth days and rotates once every 243 Earth days in the opposite direction to Earth. Its bright, reflective clouds make it the third-brightest object in Earth’s sky, often visible as the Morning Star or Evening Star.

In short

  • Venus is Earth’s closest planetary neighbour and a rocky terrestrial planet.
  • Its dense carbon dioxide atmosphere causes extreme heat via the greenhouse effect.
  • Venus rotates slowly and in the opposite direction to Earth.
  • It is easily visible from Earth as a bright morning or evening object.
Canadian angle

Venus is visible from Canada just as it is elsewhere on Earth, and its bright morning or evening appearance makes it a familiar object for Canadian skywatchers.

Quick questions

How far is Venus from Earth?
Its distance changes as both planets orbit the Sun. At closest approach, Venus is about 38 million km away; at farthest, about 261 million km.
Is Venus hotter than Mercury?
Yes. Venus is the hottest planet in the Solar System because its thick atmosphere traps heat efficiently, even though Mercury is closer to the Sun.
Can you see Venus from Earth?
Yes. Venus is one of the brightest objects in the sky and is often visible to the naked eye shortly after sunset or before sunrise.

Sources

  1. NASA Science — https://science.nasa.gov/venus/venus-facts/
    Supports: Distance from Earth, closest and farthest separation, hottest planet, closest planetary neighbour, brightness, no rings
  2. NASA Science — https://science.nasa.gov/venus/
    Supports: Second planet from the Sun, nearest planetary neighbour, hottest planet
  3. Astronomy — https://www.astronomy.com/science/venus/
    Supports: Terrestrial nature, orbital period, rotation period, atmosphere composition, surface temperature, brightness, visibility
  4. Wikipedia — https://en.wikipedia.org/wiki/Venus
    Supports: Terrestrial planet classification and general structure
  5. AstroJunkies — https://www.astrojunkies.com/how-far-is-venus-from-earth/
    Supports: Closest and farthest Earth-Venus distances