Researchers cite that spacemen heading to Mars would have to pass through Venus first

The journey of human space travel point to Mars. For years now, it has been a further step after the moon.

Nonetheless, if you are a spaceman on a journey to Mars or instead of coming back from it, you might pass through Venus on your way

An airlift to and fro Mars can occur swiftly and less expensive if it entails a Venus fly-through while heading or getting back. Noam Izenberg confirmed this

Noam is one of the many researchers and engineers supporting that a crewed operation to the red planet also stopover in Venus. This team of scientists has conscripted a white paper on the matter to be presented for peer review in Acta Astronautica. Per the article, using Venus as a foothold to Mars is not just one choice instead it is an important fragment of a crewed red planet mission

Kirby Runyon [a planetary geomorphologist] cited that Venus was how you arrived at Mars 

To progress between the universe and Mars, there are two choices. The foremost is a conjunction operation, in which a space shuttle jets between two spheres when they come into line in their orbits. After getting to Mars, spacemen would want to hang on for the planets to come into line the second time before they could get back to the universe. That holding up could consume a year.

The other choice is an opposition operation, in which — both by a trajectory to Mars or a return journey — a space shuttle would slingshot through Venus, by the usage of the planet’s gravity to change the route. Utilizing Venus for such gravity help would intensely decrease the capacity of energy required for the journey, conserving on fuel and weight as well as cost

Paul Byrne [a planetary geologist] cited that it was preferable to stopover at Venus for a gravity help on the trip to Mars

A conjunction operation may seem easy on paper, but the chances for such transmissions are less and distant between. The red planet and Earth’s orbit only come into line to permit a conjunction operation every twenty-six months. In distinction, you could hypothetically dispatch an opposition operation after every nineteen months.

Moreover, opposition operation permit for such briefer stays in the red planet; spacemen could even go for journeys as minimum as one month —rather than a year and a half that a conjunction operation may consume. While the real amount of period that this airlift may take could be lengthier, including Venus to the red planet airlift plan implies that spacemen could get back to Earth less than a year.